[tkreuzer] 40502: Return NULL, if failed to lock the provided palette in InrEngCreateXlate. Fixes bug 4378. See issue #4378 for more details.

Author: tkreuzer
Date: Tue Apr 14 20:06:07 2009
New Revision: 40502

URL: http://svn.reactos.org/svn/reactos?rev=40502&view=rev
Log:
Return NULL, if failed to lock the provided palette in InrEngCreateXlate. Fixes bug 4378.
See issue #4378 for more details.

Modified:
    trunk/reactos/subsystems/win32/win32k/eng/xlate.c

Modified: trunk/reactos/subsystems/win32/win32k/eng/xlate.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/en…
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/eng/xlate.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/eng/xlate.c [iso-8859-1] Tue Apr 14 20:06:07
2009
@@ -177,9 +177,23 @@
       DestPalGDI = PALETTE_LockPalette(PaletteDest);
 
    if (SourcePalType == 0)
+   {
+      if (!SourcePalGDI)
+      {
+          DPRINT1("Failed to lock source palette %p\n", PaletteSource);
+          return NULL;
+      }
       SourcePalType = SourcePalGDI->Mode;
+   }
    if (DestPalType == 0)
+   {
+      if (!DestPalGDI)
+      {
+          DPRINT1("Failed to lock dest palette %p\n", PaletteDest);
+          return NULL;
+      }
       DestPalType = DestPalGDI->Mode;
+   }
 
    XlateObj->iSrcType = SourcePalType;
    XlateObj->iDstType = DestPalType;