Index: region.c
===================================================================
--- region.c	(revision 54135)
+++ region.c	(working copy)
@@ -2916,9 +2916,15 @@
 
     numRects = ((numFullPtBlocks * NUMPTSTOBUFFER) + iCurPtBlock) >> 1;
 
+    if(numRects == 0)
+    {
+        reg->rdh.nCount = 0;
+        RtlZeroMemory(&reg->rdh.rcBound, sizeof(RECTL));
+    }
+
     if (!(temp = ExAllocatePoolWithTag(PagedPool, numRects * sizeof(RECT), TAG_REGION)))
     {
-        return 0;
+        return FALSE;
     }
     if (reg->Buffer != NULL)
     {
@@ -2980,7 +2986,7 @@
     }
     reg->rdh.nCount = numRects;
 
-    return(TRUE);
+    return TRUE;
 }
 
 /***********************************************************************