[greatlrd] 33872: BugFix : NtGdiBitblt follow member BitmapDest and BitmapSrc one of them can be NULL in NtGdiBitBlt logic so do not try access members in null pointer

Author: greatlrd
Date: Fri Jun  6 18:09:42 2008
New Revision: 33872

URL: http://svn.reactos.org/svn/reactos?rev=33872&view=rev
Log:
BugFix : NtGdiBitblt follow member BitmapDest and BitmapSrc one of them can be NULL in
NtGdiBitBlt logic so do not try access members in null pointer



Modified:
    trunk/reactos/subsystems/win32/win32k/objects/bitblt.c

Modified: trunk/reactos/subsystems/win32/win32k/objects/bitblt.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ob…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/objects/bitblt.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/objects/bitblt.c [iso-8859-1] Fri Jun  6
18:09:42 2008
@@ -301,7 +301,7 @@
 	}
 
 	/* Perform the bitblt operation */
-	Status = IntEngBitBlt(&BitmapDest->SurfObj, &BitmapSrc->SurfObj, NULL,
+    Status = IntEngBitBlt( BitmapDest ? &BitmapDest->SurfObj : NULL, BitmapSrc ?
&BitmapSrc->SurfObj : NULL, NULL,
                           DCDest->CombinedClip, XlateObj, &DestRect,
                           &SourcePoint, NULL,
                           BrushObj ? &BrushInst.BrushObject : NULL,