Remember the DNS lookup done when dnsmgr is called for the first time so that it does not needlessly spit out changed messages when the host really didn't change.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@69708 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/dnsmgr.c

@@ -96,6 +96,7 @@ struct ast_dnsmgr_entry *ast_dnsmgr_get(const char *name, struct in_addr *result
 	entry->result = result;
 	ast_mutex_init(&entry->lock);
 	strcpy(entry->name, name);
+	memcpy(&entry->last, result, sizeof(entry->last));
 
 	AST_LIST_LOCK(&entry_list);
 	AST_LIST_INSERT_HEAD(&entry_list, entry, list);