[CRT]

- C standard for free says "if pointer is NULL, no action is taken".
 - MSDN for HeapFree says "if pointer is NULL, behavior is undefined".
Thanks to Thomas for teaching wine guys how to read.

svn path=/trunk/; revision=55797

reactos/lib/sdk/crt/wine/heap.c

@@ -298,6 +298,7 @@ void* CDECL calloc(size_t size, size_t count)
  */
 void CDECL free(void* ptr)
 {
+  if(ptr == NULL) return;
   HeapFree(GetProcessHeap(),0,ptr);
 }