DIB_CreateDIBSection fix do not zero out memmory if it is a null pointer it got from  ExAllocatePoolWithTag
DIB_MapPaletteColors do not try write to NULL pointer if ExAllocatePoolWithTag do return a NULLL pointer.

Modified: trunk/reactos/subsys/win32k/objects/dib.c

--- trunk/reactos/subsys/win32k/objects/dib.c	2005-12-29 00:04:34 UTC (rev 20410)
+++ trunk/reactos/subsys/win32k/objects/dib.c	2005-12-29 01:57:50 UTC (rev 20411)
@@ -866,7 +866,7 @@

   if (bm.bmBits)
   {
     dib = ExAllocatePoolWithTag(PagedPool, sizeof(DIBSECTION), TAG_DIB);

-    RtlZeroMemory(dib, sizeof(DIBSECTION));

+    if (dib != NULL) RtlZeroMemory(dib, sizeof(DIBSECTION));

   }
 
   if (dib)
@@ -1125,6 +1125,12 @@

     }
 
   lpRGB = (RGBQUAD *)ExAllocatePoolWithTag(PagedPool, sizeof(RGBQUAD) * nNumColors, TAG_COLORMAP);

+  if (lpRGB == NULL)
+  {
+     PALETTE_UnlockPalette(palGDI);
+     return NULL;   
+  }
+  

   lpIndex = (USHORT *)&lpbmi->bmiColors[0];
 
   for (i = 0; i < nNumColors; i++)