Remove the Must_have_memory hack.

We are not using any alloc function that respects that variable, so
lets drop it. Backport of this commit:

  commit 0ce61e21d6d7dcca0090e319bbcdb678570f2c3f
  Author: Adam Jackson <ajax@redhat.com>
  Date:   Fri Oct 3 16:05:19 2008 -0400

    Remove the Must_have_memory hack.

    Also remove an astonishing amount of misunderstanding of how casts work.

7 files changed, 15 insertions, 37 deletions

diff --git a/nx-X11/programs/Xserver/Xi/chgkbd.c b/nx-X11/programs/Xserver/Xi/chgkbd.c
index 8f4e35773..2ca631e2d 100644
--- a/nx-X11/programs/Xserver/Xi/chgkbd.c
+++ b/nx-X11/programs/Xserver/Xi/chgkbd.c
@@ -153,11 +153,9 @@ ProcXChangeKeyboardDevice(register ClientPtr client)
 	df->time = xf->time;
 	df->traceGood = xf->traceGood;
 	if (df->traceSize != xf->traceSize) {
-	    Must_have_memory = TRUE;	/* XXX */
 	    df->trace = (WindowPtr *) realloc(df->trace,
 					       xf->traceSize *
 					       sizeof(WindowPtr));
-	    Must_have_memory = FALSE;	/* XXX */
 	}
 	df->traceSize = xf->traceSize;
 	for (i = 0; i < df->traceSize; i++)
diff --git a/nx-X11/programs/Xserver/dix/events.c b/nx-X11/programs/Xserver/dix/events.c
index 745932af3..70224c3b8 100644
--- a/nx-X11/programs/Xserver/dix/events.c
+++ b/nx-X11/programs/Xserver/dix/events.c
@@ -1938,10 +1938,8 @@ XYToWindow(int x, int y)
 	    if (spriteTraceGood >= spriteTraceSize)
 	    {
 		spriteTraceSize += 10;
-		Must_have_memory = TRUE; /* XXX */
-		spriteTrace = (WindowPtr *)realloc(
+		spriteTrace = realloc(
 		    spriteTrace, spriteTraceSize*sizeof(WindowPtr));
-		Must_have_memory = FALSE; /* XXX */
 	    }
 	    spriteTrace[spriteTraceGood++] = pWin;
 	    pWin = pWin->firstChild;
@@ -2455,11 +2453,9 @@ CheckPassiveGrabsOnWindow(
 	    {
 		if (device->sync.evcount < count)
 		{
-		    Must_have_memory = TRUE; /* XXX */
-		    device->sync.event = (xEvent *)realloc(device->sync.event,
-							    count*
-							    sizeof(xEvent));
-		    Must_have_memory = FALSE; /* XXX */
+		    device->sync.event = realloc(device->sync.event,
+						 count*
+						 sizeof(xEvent));
 		}
 		device->sync.evcount = count;
 		for (dxE = device->sync.event; --count >= 0; dxE++, xE++)
@@ -2627,10 +2623,8 @@ DeliverGrabbedEvent(register xEvent *xE, register DeviceIntPtr thisDev,
 	    FreezeThaw(thisDev, TRUE);
 	    if (thisDev->sync.evcount < count)
 	    {
-		Must_have_memory = TRUE; /* XXX */
-		thisDev->sync.event = (xEvent *)realloc(thisDev->sync.event,
-							 count*sizeof(xEvent));
-		Must_have_memory = FALSE; /* XXX */
+		thisDev->sync.event = realloc(thisDev->sync.event,
+					      count*sizeof(xEvent));
 	    }
 	    thisDev->sync.evcount = count;
 	    for (dxE = thisDev->sync.event; --count >= 0; dxE++, xE++)
@@ -3505,11 +3499,8 @@ SetInputFocus(
         if (depth > focus->traceSize)
         {
 	    focus->traceSize = depth+1;
-	    Must_have_memory = TRUE; /* XXX */
-	    focus->trace = (WindowPtr *)realloc(focus->trace,
-						 focus->traceSize *
-						 sizeof(WindowPtr));
-	    Must_have_memory = FALSE; /* XXX */
+	    focus->trace = realloc(focus->trace,
+				   focus->traceSize * sizeof(WindowPtr));
 	}
 	focus->traceGood = depth;
         for (pWin = focusWin, depth--; pWin; pWin = pWin->parent, depth--) 
diff --git a/nx-X11/programs/Xserver/hw/nxagent/NXevents.c b/nx-X11/programs/Xserver/hw/nxagent/NXevents.c
index 43dfe8613..78d74a0d5 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/NXevents.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/NXevents.c
@@ -367,10 +367,8 @@ XYToWindow(int x, int y)
 	    if (spriteTraceGood >= spriteTraceSize)
 	    {
 		spriteTraceSize += 10;
-		Must_have_memory = TRUE; /* XXX */
-		spriteTrace = (WindowPtr *)realloc(
+		spriteTrace = realloc(
 		    spriteTrace, spriteTraceSize*sizeof(WindowPtr));
-		Must_have_memory = FALSE; /* XXX */
 	    }
 	    spriteTrace[spriteTraceGood++] = pWin;
 	    pWin = pWin->firstChild;
diff --git a/nx-X11/programs/Xserver/include/globals.h b/nx-X11/programs/Xserver/include/globals.h
index d5b9c4407..50aaaa2bf 100644
--- a/nx-X11/programs/Xserver/include/globals.h
+++ b/nx-X11/programs/Xserver/include/globals.h
@@ -20,7 +20,6 @@ extern int monitorResolution;
 extern Bool loadableFonts;
 extern int defaultColorVisualClass;
 
-extern Bool Must_have_memory;
 extern int GrabInProgress;
 extern char *ConnectionInfo;
 extern Bool noTestExtensions;
diff --git a/nx-X11/programs/Xserver/mi/micursor.c b/nx-X11/programs/Xserver/mi/micursor.c
index e95c43b3d..90b0f2ae9 100644
--- a/nx-X11/programs/Xserver/mi/micursor.c
+++ b/nx-X11/programs/Xserver/mi/micursor.c
@@ -53,8 +53,6 @@ SOFTWARE.
 #include "misc.h"
 #include "mi.h"
 
-extern Bool Must_have_memory;
-
 void
 miRecolorCursor( pScr, pCurs, displayed)
     ScreenPtr	pScr;
@@ -65,11 +63,9 @@ miRecolorCursor( pScr, pCurs, displayed)
      * This is guaranteed to correct any color-dependent state which may have
      * been bound up in private state created by RealizeCursor
      */
-    (* pScr->UnrealizeCursor)( pScr, pCurs);
-    Must_have_memory = TRUE; /* XXX */
-    (* pScr->RealizeCursor)( pScr, pCurs);
-    Must_have_memory = FALSE; /* XXX */
-    if ( displayed)
-	(* pScr->DisplayCursor)( pScr, pCurs);
+    pScr->UnrealizeCursor(pScr, pCurs);
+    pScr->RealizeCursor(pScr, pCurs);
+    if (displayed)
+	pScr->DisplayCursor(pScr, pCurs);
 
 }
diff --git a/nx-X11/programs/Xserver/mi/migc.c b/nx-X11/programs/Xserver/mi/migc.c
index 4d67cbf5d..afd5031a4 100644
--- a/nx-X11/programs/Xserver/mi/migc.c
+++ b/nx-X11/programs/Xserver/mi/migc.c
@@ -68,11 +68,9 @@ miCreateGCOps(prototype)
 {
     GCOpsPtr        ret;
 
-     /* XXX */ Must_have_memory = TRUE;
-    ret = (GCOpsPtr) malloc(sizeof(GCOps));
-     /* XXX */ Must_have_memory = FALSE;
+    ret = malloc(sizeof(GCOps));
     if (!ret)
-	return 0;
+	return NULL;
     *ret = *prototype;
     ret->devPrivate.val = 1;
     return ret;
diff --git a/nx-X11/programs/Xserver/os/utils.c b/nx-X11/programs/Xserver/os/utils.c
index 0a1e3f7b2..5634bb621 100644
--- a/nx-X11/programs/Xserver/os/utils.c
+++ b/nx-X11/programs/Xserver/os/utils.c
@@ -257,8 +257,6 @@ Bool PanoramiXExtensionDisabledHack = FALSE;
 
 int auditTrailLevel = 1;
 
-Bool Must_have_memory = FALSE;
-
 #if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)
 #define HAS_SAVED_IDS_AND_SETEUID
 #endif