Problem/Motivation
Errors occur when backing up files using Backup and Migrate.
Undefined variable $v_uname system.tar.inc:1496
Undefined variable $v_gname system.tar.inc:1497
Steps to reproduce
drush bam-backup files
Proposed resolution
Add missing lines from Tar.php (1.4.14) to system.tar.inc
$v_uname = '';
$v_gname = '';