macosx: workaround for lion fullscreen behaviour at startup (refs #6668)

(cherry picked from commit 8d9646c1)
Signed-off-by: David Fuhrmann <david.fuhrmann@googlemail.com>

modules/gui/macosx/MainWindow.m

@@ -2084,6 +2084,9 @@ static VLCMainWindow *_o_sharedInstance = nil;
 #pragma mark Lion's native fullscreen handling
 - (void)windowWillEnterFullScreen:(NSNotification *)notification
 {
+    // workaround, see #6668
+    [NSApp setPresentationOptions:(NSApplicationPresentationFullScreen | NSApplicationPresentationAutoHideDock | NSApplicationPresentationAutoHideMenuBar)];
+
     var_SetBool( pl_Get( VLCIntf ), "fullscreen", true );
     
     vout_thread_t *p_vout = getVout();