[PATCH] ntdll: Fix valgrind heap realloc notifications.

[Thomas Faller]

Valgrind can't handle a realloc, if the new size is zero.
Fix for bug https://bugs.winehq.org/show_bug.cgi?id=37646

Signed-off-by: Thomas Faller <tfaller1 at gmx.de>
---
  dlls/ntdll/heap.c | 35 +++++++++++++++++++++++------------
  1 file changed, 23 insertions(+), 12 deletions(-)




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