Updates to fix Watcom C/C++ 11.0 compiler warning problems. Now compiles

clean with this compiler. Hopefully I did this without breaking other
compilers.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@9967 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/event.h

@@ -1575,7 +1575,7 @@ public:
                   wxObject *userData = (wxObject *) NULL )
         { Connect(id, -1, eventType, func, userData); }
 
-    bool Disconnect( int id, int lastId = -1, wxEventType eventType = wxEVT_NULL,
+    bool Disconnect( int id, int lastId, wxEventType eventType,
                   wxObjectEventFunction func = NULL,
                   wxObject *userData = (wxObject *) NULL );