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-rw-r--r--nx-X11/programs/Xserver/hw/nxagent/Clipboard.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c b/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
index 8844c88df..7fefd5ee1 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Clipboard.c
@@ -1592,6 +1592,14 @@ Bool nxagentCollectPropertyEventFromXServer(int resource)
int index = 0;
+ if (resource < 0)
+ {
+ #ifdef DEBUG
+ fprintf (stderr, "%s: resource [%d] is invalid.\n", __func__, resource);
+ #endif
+ return False;
+ }
+
/* determine the selection we are talking about here */
for (index = 0; index < nxagentMaxSelections; index++)
{