[RTL]

- ASSERT on damaged heap data structures instead of producing an infinite loop
See issue #5857 for more details.

svn path=/trunk/; revision=54749

reactos/lib/rtl/heap.c

@@ -669,6 +669,7 @@ RtlpFindAndCommitPages(PHEAP Heap,
 
             while (!(LastEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
             {
+                ASSERT(LastEntry->Size != 0);
                 LastEntry += LastEntry->Size;
             }
             ASSERT((LastEntry + LastEntry->Size) == FirstEntry);