control: Fix multiple event_manager leaks.

src/control/media_library.c

@@ -67,6 +67,7 @@ void libvlc_media_library_release( libvlc_media_library_t * p_mlib )
     if( p_mlib->i_refcount > 0 )
         return;
 
+    libvlc_event_manager_release( p_mlib->p_event_manager );
 	free( p_mlib );
 }
 

src/control/media_list_player.c

@@ -221,6 +221,7 @@ libvlc_media_list_player_new( libvlc_instance_t * p_instance,
  **************************************************************************/
 void libvlc_media_list_player_release( libvlc_media_list_player_t * p_mlp )
 {
+    libvlc_event_manager_release( p_mlib->p_event_manager );
     free(p_mlp);
 }