make wxSelectDispatcher ctor public, it can be useful to create it in places other than wxFDIODispatcher

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@52681 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/fdiodispatcher.cpp

@@ -54,7 +54,7 @@ wxFDIODispatcher *wxFDIODispatcher::Get()
         if ( !gs_dispatcher )
 #endif // wxUSE_EPOLL_DISPATCHER
 #if wxUSE_SELECT_DISPATCHER
-            gs_dispatcher = wxSelectDispatcher::Create();
+            gs_dispatcher = new wxSelectDispatcher();
 #endif // wxUSE_SELECT_DISPATCHER
     }