minor fix that was part of helpbest.patch

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11521 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/common/log.cpp b/src/common/log.cpp
index d20aa9b6dd4478c9d91961db4abce0257fb3ef8f..be03d3c4c8b3a9e12f476e81d01dc663801b6cb9 100644 (file)
--- a/src/common/log.cpp
+++ b/src/common/log.cpp
@@ -732,7 +732,10 @@ const wxChar *wxSysErrorMsg(unsigned long nErrCode)
             0, NULL);
 
     // copy it to our buffer and free memory
-    wxStrncpy(s_szBuf, (const wxChar *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
+    if( lpMsgBuf != 0 )
+        wxStrncpy(s_szBuf, (const wxChar *)lpMsgBuf, WXSIZEOF(s_szBuf) - 1);
+    else
+        s_szBuf[0] = wxT('\0');
     s_szBuf[WXSIZEOF(s_szBuf) - 1] = wxT('\0');
     LocalFree(lpMsgBuf);