loplugin:redundantcast (after loplugin:cstylecast, macOS)

Change-Id: Ife73b464b39c1556f4549226d835d6c8f2b50c1a
Reviewed-on: https://gerrit.libreoffice.org/48191Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

avmedia/source/macavf/player.mm

@@ -37,7 +37,7 @@ using namespace ::com::sun::star;
 
 - (void)onNotification:(NSNotification*)pNotification
 {
-    NSString* pNoteName = (NSString*)[pNotification name];
+    NSString* pNoteName = [pNotification name];
     HandlersForObject::iterator it = maHandlersForObject.find( [pNotification object]);
     if( it != maHandlersForObject.end() )
         (*it).second->handleObservation( pNoteName );