Stop any generators running on a channel when

festival is called as described in 5996


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@8140 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_festival.c

@@ -175,7 +175,8 @@ static int send_waveform_to_channel(struct ast_channel *chan, char *waveform, in
 	if (chan->_state != AST_STATE_UP)
 		ast_answer(chan);
 	ast_stopstream(chan);
-
+	ast_indicate(chan, -1);
+	
 	owriteformat = chan->writeformat;
 	res = ast_set_write_format(chan, AST_FORMAT_SLINEAR);
 	if (res < 0) {