macosx: Display no results message if relevant in playlists view

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

modules/gui/macosx/library/playlist-library/VLCLibraryPlaylistViewController.m

@@ -274,10 +274,12 @@
 {
     const vlc_ml_playlist_type_t playlistType = self.dataSource.playlistType;
     VLCLibraryModel * const libraryModel = VLCMain.sharedInstance.libraryController.libraryModel;
-    if ([libraryModel numberOfPlaylistsOfType:playlistType] <= 0) {
-        [self presentPlaceholderPlaylistLibraryView];
-    } else {
+    if ([libraryModel numberOfPlaylistsOfType:playlistType] > 0) {
         [self presentPlaylistLibraryView];
+    } else if (self.dataSource.libraryModel.filterString.length > 0) {
+        [self.libraryWindow displayNoResultsMessage];
+    } else {
+        [self presentPlaceholderPlaylistLibraryView];
     }
 }