use wxEventLoop in wxApp under wxMSW; factored out common code from wxX11/wxMotif/wxMGL to wxAppBase; changed wxApp::Dispatch() return type

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23609 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/app.h

@@ -45,7 +45,7 @@ public:
     virtual void ExitMainLoop();
     virtual bool Initialized();
     virtual bool Pending();
-    virtual void Dispatch();
+    virtual bool Dispatch();
 
     virtual void Exit();