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-rw-r--r--nx-X11/programs/Xserver/os/io.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/nx-X11/programs/Xserver/os/io.c b/nx-X11/programs/Xserver/os/io.c
index a02d7fb0c..23f436b84 100644
--- a/nx-X11/programs/Xserver/os/io.c
+++ b/nx-X11/programs/Xserver/os/io.c
@@ -1004,6 +1004,10 @@ FlushClient(ClientPtr who, OsCommPtr oc, const void *__extraBuf, int extraCount)
written = 0;
padsize = padlength[extraCount & 3];
notWritten = oco->count + extraCount + padsize;
+
+ if (!notWritten)
+ return 0;
+
todo = notWritten;
while (notWritten) {
long before = written; /* amount of whole thing written */