Thomas Faller : ntdll: Fix valgrind heap realloc notifications.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a0b8f178df8ed704fc732f5aef3b2e1f623512fc
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=a0b8f178df8ed704fc732f5aef3b2e1f623512fc

Author: Thomas Faller <tfaller1 at gmx.de>
Date:   Wed Dec 16 22:00:58 2015 +0100

ntdll: Fix valgrind heap realloc notifications.

Valgrind can't handle a realloc if the new size is zero.

Signed-off-by: Thomas Faller <tfaller1 at gmx.de>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/ntdll/heap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c
index a908f19..f928ebf 100644
--- a/dlls/ntdll/heap.c
+++ b/dlls/ntdll/heap.c
@@ -266,7 +266,8 @@ static inline void notify_free( void const *ptr )
 static inline void notify_realloc( void const *ptr, SIZE_T size_old, SIZE_T size_new )
 {
 #ifdef VALGRIND_RESIZEINPLACE_BLOCK
-    VALGRIND_RESIZEINPLACE_BLOCK( ptr, size_old, size_new, 0 );
+    /* zero is not a valid size */
+    VALGRIND_RESIZEINPLACE_BLOCK( ptr, size_old ? size_old : 1, size_new ? size_new : 1, 0 );
 #endif
 }