playlist: fix "clear" crash in random mode

When MPD is not playing while in random mode, and the client issues
the "clear" command, MPD crashes in stopPlaylist(), or more exactly,
in queue_order_to_position(-1).  Exit from stopPlaylist() if MPD isn't
playing.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/playlist.c b/src/playlist.c
index 8be8b0553..31d2fe1b8 100644
--- a/src/playlist.c
+++ b/src/playlist.c
@@ -660,6 +660,11 @@ deleteASongFromPlaylist(const struct song *song)
 
 void stopPlaylist(void)
 {
+	if (!playlist.playing)
+		return;
+
+	assert(playlist.current >= 0);
+
 	g_debug("playlist: stop");
 	playerWait();
 	playlist.queued = -1;