Fix typo in check_clones()

Run kmem_free() after zap_cursor_fini().

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Reviewed-by: Adam Moss <c@yotes.com>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #14702

module/zfs/spa_errlog.c

@@ -470,9 +470,9 @@ static int check_clones(spa_t *spa, uint64_t zap_clone, uint64_t snap_count,
 			break;
 	}
 
+	zap_cursor_fini(zc);
 	kmem_free(za, sizeof (*za));
 	kmem_free(zc, sizeof (*zc));
-	zap_cursor_fini(zc);
 
 	return (error);
 }