merge anthm fix for atoi(NULL) segfault. Thanks jart for identifying the problem.

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1560 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch.h

@@ -101,7 +101,6 @@ END_EXTERN_C
  *	Additionally, the experimental external modules make use of several external modules:
  *
  *	mod_Exosip:
- *		- JRTPlib (http://research.edm.luc.ac.be/jori/jrtplib/jrtplib.html)
  *		- eXoSIP (http://savannah.nongnu.org/projects/exosip/)
  *
  *	mod_iaxchan:

src/mod/endpoints/mod_exosip/mod_exosip.c

@@ -1575,8 +1575,11 @@ static void handle_message_new(eXosip_event_t *je)
 				}
 
 
-				expires = get_header_value(je, "expires");
+				if ((expires = get_header_value(je, "expires"))) {
 					exptime = time(NULL) + atoi(expires) + 20;
+				} else {
+					exptime = time(NULL) + 3600;
+				}
 
 				
 				if (!find_reg_url(globals.db, je->request->from->url->username, sql, sizeof(sql))) {