Ensure there is a valid tone part before trying to play tones.

(closes issue #14558)
Reported by: alecdavis

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@178764 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/indications.c b/main/indications.c
index 1fe01f1..5b26ff2 100644 (file)
--- a/main/indications.c
+++ b/main/indications.c
@@ -374,6 +374,11 @@ int ast_playtones_start(struct ast_channel *chan, int vol, const char *playlst,
                d.nitems++;
        }
 
+       if (!d.nitems) {
+               ast_log(LOG_ERROR, "No valid tone parts\n");
+               return -1;
+       }
+
        if (ast_activate_generator(chan, &playtones, &d)) {
                ast_free(d.items);
                return -1;