queue_save: queue_load_song() returns void

The only caller doesn't use its return value, and the value isn't
useful anyway.

src/playlist_state.c

@@ -101,8 +101,6 @@ playlist_state_save(FILE *fp, const struct playlist *playlist)
 static void
 playlist_state_load(FILE *fp, GString *buffer, struct playlist *playlist)
 {
-	int song;
-
 	const char *line = read_text_line(fp, buffer);
 	if (line == NULL) {
 		g_warning("No playlist in state file");
@@ -110,7 +108,7 @@ playlist_state_load(FILE *fp, GString *buffer, struct playlist *playlist)
 	}
 
 	while (!g_str_has_prefix(line, PLAYLIST_STATE_FILE_PLAYLIST_END)) {
-		song = queue_load_song(&playlist->queue, line);
+		queue_load_song(&playlist->queue, line);
 
 		line = read_text_line(fp, buffer);
 		if (line == NULL) {

src/queue_save.c

@@ -53,7 +53,7 @@ get_song(const char *uri)
 	return NULL;
 }
 
-int
+void
 queue_load_song(struct queue *queue, const char *line)
 {
 	long ret;
@@ -61,20 +61,19 @@ queue_load_song(struct queue *queue, const char *line)
 	struct song *song;
 
 	if (queue_is_full(queue))
-		return -1;
+		return;
 
 	ret = strtol(line, &endptr, 10);
 	if (ret < 0 || *endptr != ':' || endptr[1] == 0) {
 		g_warning("Malformed playlist line in state file");
-		return -1;
+		return;
 	}
 
 	line = endptr + 1;
 
 	song = get_song(line);
 	if (song == NULL)
-		return -1;
+		return;
 
 	queue_append(queue, song);
-	return ret;
 }

src/queue_save.h

@@ -33,10 +33,9 @@ void
 queue_save(FILE *fp, const struct queue *queue);
 
 /**
- * Loads one song from the state file line and returns its number.
- * Returns -1 on failure.
+ * Loads one song from the state file and appends it to the queue.
  */
-int
+void
 queue_load_song(struct queue *queue, const char *line);
 
 #endif