Fixes issue with hangups not being sent and external process never terminating.

The ignore_hangup, run_dead, and noanswer flags were never initilized to zero causing hangups to never be issued.  If the external script expects to be notified of a hangup and never receives one, it runs indefinitely. 

(closes issue #14251)
Reported by: chris-mac
Tested by: dvossel



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@174325 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_externalivr.c

@@ -322,7 +322,7 @@ static struct playlist_entry *make_entry(const char *filename)
 
 static int app_exec(struct ast_channel *chan, void *data)
 {
-	struct ast_flags flags;
+	struct ast_flags flags = { 0, };
 	char *opts[0];
 	struct playlist_entry *entry;
 	int child_stdin[2] = { 0, 0 };