Compare technology using the pointers instead of a straight comparison based on name. (issue #8228 reported by dean bath)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@47764 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11586,7 +11586,7 @@ static void handle_response_invite(struct sip_pvt *p, int resp, char *rest, stru
 				ast_log(LOG_WARNING, "Ooooh.. no tech!  That's REALLY bad\n");
 				break;
 			}
-			if (!strcasecmp(bridgepeer->tech->type,"SIP")) {
+			if (bridgepeer->tech == &sip_tech) {
 				bridgepvt = (struct sip_pvt*)(bridgepeer->tech_pvt);
 				if (bridgepvt->udptl) {
 					if (p->t38.state == T38_PEER_REINVITE) {
@@ -13308,7 +13308,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 				if ((bridgepeer = ast_bridged_channel(p->owner))) {
 					/* We have a bridge, and this is re-invite to switchover to T38 so we send re-invite with T38 SDP, to other side of bridge*/
 					/*! XXX: we should also check here does the other side supports t38 at all !!! XXX */
-					if (!strcasecmp(bridgepeer->tech->type, "SIP")) { /* If we are bridged to SIP channel */
+					if (bridgepeer->tech == &sip_tech) {
 						bridgepvt = (struct sip_pvt*)bridgepeer->tech_pvt;
 						if (bridgepvt->t38.state == T38_DISABLED) {
 							if (bridgepvt->udptl) { /* If everything is OK with other side's udptl struct */
@@ -13362,7 +13362,7 @@ static int handle_request_invite(struct sip_pvt *p, struct sip_request *req, int
 				struct ast_channel *bridgepeer = NULL;
 				struct sip_pvt *bridgepvt = NULL;
 				if ((bridgepeer = ast_bridged_channel(p->owner))) {
-					if (!strcasecmp(bridgepeer->tech->type, sip_tech.type)) {
+					if (bridgepeer->tech == &sip_tech) {
 						bridgepvt = (struct sip_pvt*)bridgepeer->tech_pvt;
 						/* Does the bridged peer have T38 ? */
 						if (bridgepvt->t38.state == T38_ENABLED) {