ntdll: add missing valgrind hook in RtlAllocateHeap

[Rob Shearman]

2009/4/15 Dan Kegel <dank at kegel.com>:
> Two chromium unit tests reported phony errors
> when run on wine on valgrind because
> RtlAllocateHeap sometimes returned an
> allocation without notifying valgrind about it.

RtlReAllocateHeap is also missing valgrind notifications for the large
block paths. It also appears that the function leaks memory in the
realloc small -> large path.

-- 
Rob Shearman