return the result of the lxcapi_want_close_all_fds call to the caller

src/lxc/lxccontainer.c

@@ -456,16 +456,17 @@ static void lxcapi_want_daemonize(struct lxc_container *c)
 	container_mem_unlock(c);
 }
 
-static void lxcapi_want_close_all_fds(struct lxc_container *c)
+static bool lxcapi_want_close_all_fds(struct lxc_container *c)
 {
 	if (!c || !c->lxc_conf)
-		return;
+		return false;
 	if (container_mem_lock(c)) {
 		ERROR("Error getting mem lock");
-		return;
+		return false;
 	}
 	c->lxc_conf->close_all_fds = 1;
 	container_mem_unlock(c);
+	return true;
 }
 
 static bool lxcapi_wait(struct lxc_container *c, const char *state, int timeout)

src/lxc/lxccontainer.h

@@ -68,7 +68,7 @@ struct lxc_container {
 	bool (*startl)(struct lxc_container *c, int useinit, ...);
 	bool (*stop)(struct lxc_container *c);
 	void (*want_daemonize)(struct lxc_container *c);
-	void (*want_close_all_fds)(struct lxc_container *c);
+	bool (*want_close_all_fds)(struct lxc_container *c);
 	// Return current config file name.  The result is strdup()d, so free the result.
 	char *(*config_file_name)(struct lxc_container *c);
 	// for wait, timeout == -1 means wait forever, timeout == 0 means don't wait.