confile: adapt layout of getter callback

src/lxc/confile.h

@@ -33,7 +33,7 @@ struct lxc_list;
 struct lxc_container;
 
 typedef int (*config_set_cb)(const char *, const char *, struct lxc_conf *);
-typedef int (*config_get_cb)(struct lxc_container *, const char *, char *, int);
+typedef int (*config_get_cb)(const char *, char *, int, struct lxc_conf *);
 typedef int (*config_clear_cb)(void);
 struct lxc_config_t {
 	char *name;

src/lxc/lxccontainer.c

@@ -1999,7 +1999,7 @@ static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, c
 	 * implemented.
 	 */
 	if (config && config->get)
-		ret = config->get(c, key, retv, inlen);
+		ret = config->get(key, retv, inlen, c->lxc_conf);
 
 	container_mem_unlock(c);
 	return ret;