make modules unbind events and un-reserve subclasses on module unload

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@8898 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/endpoints/mod_sofia/sofia_presence.c

@@ -1413,7 +1413,7 @@ void sofia_presence_handle_sip_i_subscribe(int status,
 			char *sticky = NULL;
 
 			if (is_nat) {
-				const char *ipv6 = strchr(network_ip, ':');
+				ipv6 = strchr(network_ip, ':');
 				sticky = switch_mprintf("sip:%s@%s%s%s:%d",
 										contact_user,
 										ipv6 ? "[" : "",