fix use-after-free

extra/mariabackup/xtrabackup.cc

@@ -3132,13 +3132,13 @@ xb_load_single_table_tablespace(
 		}
 	}
 
-	ut_free(name);
-
 	delete file;
 
 	if (err != DB_SUCCESS && xtrabackup_backup && !is_empty_file) {
 		die("Failed to not validate first page of the file %s, error %d",name, (int)err);
 	}
+
+	ut_free(name);
 }
 
 /** Scan the database directories under the MySQL datadir, looking for