made definition of wxUSE_LOG_DEBUG dependent on wxDEBUG_LEVEL and added wxUSE_LOG_TRACE (currently never enabled by default); fix warnings about unused variables after these changes

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59736 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/dnd.h

@@ -40,8 +40,8 @@ public:
     wxDataFormat GetMatchingPair();
 
     // implementation
-    
-    GdkAtom GtkGetMatchingPair();
+
+    GdkAtom GtkGetMatchingPair(bool quiet = false);
 
     void GtkRegisterWidget( GtkWidget *widget );
     void GtkUnregisterWidget( GtkWidget *widget );