Stefan Leichter : kernel32: Fix OutputDebugStringA called with NULL pointer .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 68aa42a4191c50bb9bf2767c51a4b9c7b7aaef5e
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=68aa42a4191c50bb9bf2767c51...

Author: Stefan Leichter <Stefan.Leichter(a)camline.com>
Date:   Wed May 30 22:47:34 2012 +0200

kernel32: Fix OutputDebugStringA called with NULL pointer.

---

 dlls/kernel32/debugger.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/dlls/kernel32/debugger.c b/dlls/kernel32/debugger.c
index 7e1a860..528ba76 100644
--- a/dlls/kernel32/debugger.c
+++ b/dlls/kernel32/debugger.c
@@ -245,6 +245,8 @@ void WINAPI OutputDebugStringA( LPCSTR str )
     static HANDLE DBWinMutex = NULL;
     static BOOL mutex_inited = FALSE;
 
+    if (!str) str = "";
+
     /* send string to attached debugger */
     SERVER_START_REQ( output_debug_string )
     {