Revert code that changed SSRC for DTMF.

Some previous behavior was attempted to be restored, but mistakingly I did
not realize that the previous behavior was incorrect. This fixes DTMF not
being detected since DTMF shouldn't cause the SSRC to change.

(related to issue #17404)
(closes issue #18189)
(closes issue #18352)
Reported by: marcbou
Tested by: cmbaker82


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@297823 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -4790,8 +4790,8 @@ enum ast_bridge_result ast_channel_bridge(struct ast_channel *c0, struct ast_cha
 		ast_set_flag(c0, AST_FLAG_END_DTMF_ONLY);
 
 	/* Before we enter in and bridge these two together tell them both the source of audio has changed */
-	ast_indicate(c0, AST_CONTROL_SRCCHANGE);
-	ast_indicate(c1, AST_CONTROL_SRCCHANGE);
+	ast_indicate(c0, AST_CONTROL_SRCUPDATE);
+	ast_indicate(c1, AST_CONTROL_SRCUPDATE);
 
 	for (/* ever */;;) {
 		struct timeval now = { 0, };