fixes FXS port still ringing when answered, as reported by Tzafrir on dev-list.

(issue #17067)
Reported by: tzafrir
Tested by: alecdavis



git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@270404 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -4532,6 +4532,7 @@ static struct ast_frame *dahdi_handle_event(struct ast_channel *ast)
 					p->subs[index].f.frametype = AST_FRAME_CONTROL;
 					p->subs[index].f.subclass = AST_CONTROL_ANSWER;
 					/* Make sure it stops ringing */
+					dahdi_set_hook(p->subs[index].dfd, DAHDI_OFFHOOK);
 					p->subs[SUB_REAL].needringing = 0;
 					ast_log(LOG_DEBUG, "channel %d answered\n", p->channel);
 					if (p->cidspill) {