directory: update playlist version if updated

If we updated the mpd metadata database; then there's a chance
some of those songs in the playlist will have updated metadata.
So be on the safe side and increment the playlist version number
if _any_ song changed (this is how all released versions of mpd
did it, too).

This bug was introduced recently when making "update" threaded.

Thanks to stonecrest for the bug report.

1 files changed, 6 insertions, 1 deletions

diff --git a/src/directory.c b/src/directory.c
index 64d55e7e..31b1e9a8 100644
--- a/src/directory.c
+++ b/src/directory.c
@@ -123,9 +123,14 @@ int isUpdatingDB(void)
 
 void reap_update_task(void)
 {
+	enum update_return ret;
+
 	if (progress != UPDATE_PROGRESS_DONE)
 		return;
-	pthread_join(update_thr, NULL);
+	if (pthread_join(update_thr, (void **)&ret))
+		FATAL("error joining update thread: %s\n", strerror(errno));
+	if (ret == UPDATE_RETURN_UPDATED)
+		playlistVersionChange();
 	progress = UPDATE_PROGRESS_IDLE;
 }