Fix little leak thanks to James G.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@767 65c4cc65-6c06-0410-ace0-fbb531ad65f3

config.c

@@ -66,6 +66,7 @@ static void free_comments(struct ast_comment *com)
 	while (com) {
 		l = com;
 		com = com->next;
+		free(l->comment);
 		free(l);
 	}
 }