[greatlrd] 20411: DIB_CreateDIBSection fix do not zero out memmory if it is a null pointer it got from ExAllocatePoolWithTag

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
  _____  

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++)