playlist: return -1 after assert(0)

print_playlist_result() had an assert(0) at the end, in case there was
an invalid result value.  With NDEBUG, this resulted in a function not
returning a value - add a dummy "return -1" at the end to keep gcc
quiet.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/command.c b/src/command.c
index 1da3736d1..ebca41bde 100644
--- a/src/command.c
+++ b/src/command.c
@@ -263,6 +263,7 @@ static int print_playlist_result(int fd, enum playlist_result result)
 	}
 
 	assert(0);
+	return -1;
 }
 
 static void addCommand(const char *name,