Use Bind() instead of Connect() in wxWidgets code

Use more modern function which allows to avoid wxXXXEventHandler()
macros use.

No real changes.

src/unix/mediactrl.cpp

@@ -205,8 +205,8 @@ class wxGStreamerMediaEventHandler : public wxEvtHandler
     public:
     wxGStreamerMediaEventHandler(wxGStreamerMediaBackend* be) : m_be(be)
     {
-        this->Connect(wxID_ANY, wxEVT_MEDIA_FINISHED,
-           wxMediaEventHandler(wxGStreamerMediaEventHandler::OnMediaFinish));
+        this->Bind(wxEVT_MEDIA_FINISHED,
+           &wxGStreamerMediaEventHandler::OnMediaFinish, this);
     }
 
     void OnMediaFinish(wxMediaEvent& event);