playlist: playlist_LiveSearchUpdate is locked, no need to signal_maybe().

src/playlist/search.c

@@ -172,6 +172,6 @@ int playlist_LiveSearchUpdate( playlist_t *p_playlist, playlist_item_t *p_root,
     PL_ASSERT_LOCKED;
     p_playlist->b_reset_currently_playing = true;
     playlist_LiveSearchUpdateInternal( p_playlist, p_root, psz_string );
-    vlc_object_signal_maybe( VLC_OBJECT(p_playlist) );
+    vlc_object_signal_unlocked( p_playlist );
     return VLC_SUCCESS;
 }