fix/suppress warning about hiding base class Load(wxURI,wxURI) overload

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57540 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/mediactrl.cpp

@@ -160,6 +160,10 @@ public:
 
     virtual bool Load(const wxString& fileName);
     virtual bool Load(const wxURI& location);
+    virtual bool Load(const wxURI& location,
+                      const wxURI& proxy)
+        { return wxMediaBackendCommonBase::Load(location, proxy); }
+
 
     virtual wxMediaState GetState();