compilation fix for platforms where size_t is unsigned long, not int

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40305 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/log.cpp

@@ -754,7 +754,7 @@ wxLogPassThrough::wxLogPassThrough()
 
 bool            wxLog::ms_bRepetCounting = false;
 wxString        wxLog::ms_prevString;
-size_t          wxLog::ms_prevCounter = 0;
+unsigned int    wxLog::ms_prevCounter = 0;
 time_t          wxLog::ms_prevTimeStamp= 0;
 wxLogLevel      wxLog::ms_prevLevel;