Merge pull request #681 from shiningstarj/dialoginfo-memory-leak

Presence_dialoginfo: Fix memory leaks in notify_body.c
(cherry picked from commit ab5cd61)

modules/presence_dialoginfo/notify_body.c

@@ -415,7 +415,7 @@ str* build_dialoginfo(str* pres_user, str* pres_domain)
 	if(body == NULL)
 	{
 		LM_ERR("while allocating memory\n");
-		return NULL;
+		goto error;
 	}
 	memset(body, 0, sizeof(str));