Fix new wxExecute() code compilation with wxUSE_CONSOLE_EVENTLOOP==0.

Nothing is going to work without the console apps/base traits support for the
event loop but at least make it compile.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74531 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/unix/apptbase.h

@@ -49,9 +49,11 @@ public:
     virtual wxFDIOManager *GetFDIOManager();
 #endif // wxUSE_SOCKETS
 
+#if wxUSE_CONSOLE_EVENTLOOP
     // Return a non-NULL pointer to the object responsible for managing the
     // event loop sources in this kind of application.
     virtual wxEventLoopSourcesManagerBase* GetEventLoopSourcesManager();
+#endif // wxUSE_CONSOLE_EVENTLOOP
 
 protected:
     // Wait for the process termination by running the given event loop until