res_pjsip_keepalive: Don't crash if PJSIP module is not loaded.

........

Merged revisions 431555 from http://svn.asterisk.org/svn/asterisk/branches/13

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@431556 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_pjsip_keepalive.c b/res/res_pjsip_keepalive.c
index 43f7734..5e9d168 100644 (file)
--- a/res/res_pjsip_keepalive.c
+++ b/res/res_pjsip_keepalive.c
@@ -240,6 +240,8 @@ static struct ast_sorcery_observer keepalive_global_observer = {
 
 static int load_module(void)
 {
+       CHECK_PJSIP_MODULE_LOADED();
+
        ast_sorcery_observer_add(ast_sip_get_sorcery(), "global", &keepalive_global_observer);
        ast_sorcery_reload_object(ast_sip_get_sorcery(), "global");
        ast_module_ref(ast_module_info->self);