Ascom phones send Flash events as SIP INFO using '!' as the 'digit'

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@98124 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -12625,6 +12625,8 @@ static void handle_request_info(struct sip_pvt *p, struct sip_request *req)
 			event = 11;
 		else if ((buf[0] >= 'A') && (buf[0] <= 'D'))
 			event = 12 + buf[0] - 'A';
+		else if (buf[0] == '!')
+			event = 16;
 		else
 			event = atoi(buf);
 		if (event == 16) {