Fixed crash in Life demo on Mac

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38363 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

demos/life/game.h

@@ -54,7 +54,12 @@ public:
         m_name        = name;
         m_description = description;
         m_rules       = wxEmptyString;
+        // TODO: add the positions later, since the formatting command
+        // causes a crash due to conversion objects not being available
+        // during initialisation.
+#ifndef __WXMAC__
         m_shape.Add( wxString::Format(_T("%i %i"), -width/2, -height/2) );
+#endif
         for(int j = 0; j < height; j++)
         {
             wxString tmp;