interim fix for SFSIP-55, don't segfault on subscribe with Expires: 0

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8174 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/.update

-Mon Apr 21 18:30:34 EDT 2008
+Tue Apr 22 16:13:56 CDT 2008

libs/sofia-sip/libsofia-sip-ua/nua/nua_notifier.c

@@ -351,8 +351,8 @@ int nua_subscribe_server_report(nua_server_request_t *sr, tagi_t const *tags)
 
   /* nu_requested is set by SUBSCRIBE and cleared when NOTIFY is sent */
   if (nu && nu->nu_requested && substate != nua_substate_embryonic) {
-#if SU_HAVE_EXPERIMENTAL
     sip_t const *sip = sr->sr_request.sip;
+#if SU_HAVE_EXPERIMENTAL
     sip_suppress_notify_if_match_t *snim = sip_suppress_notify_if_match(sip);
     sip_suppress_body_if_match_t *sbim = sip_suppress_body_if_match(sip);
     
@@ -364,7 +364,7 @@ int nua_subscribe_server_report(nua_server_request_t *sr, tagi_t const *tags)
       notify = 1, nu->nu_no_body = 1;
     else 
 #endif
-      notify = 1;
+		if (sip->sip_expires && sip->sip_expires->ex_delta) notify = 1;
   }
 
   retval = nua_base_server_treport(sr, NUTAG_SUBSTATE(substate), TAG_END());