handle warnings better when 'cvs add dir' is performed

tested with cvs 1.11 with old mode, for cvs 1.12 new mode, just guessed

$ cvs add test
PHP Notice: Undefined offset: 2 in /usr/sbin/eventum-cvs-hook on line 50
PHP Notice: Undefined offset: 1 in /usr/sbin/eventum-cvs-hook on line 50
PHP Notice: Undefined offset: 2 in /usr/sbin/eventum-cvs-hook on line 50
PHP Notice: Undefined offset: 1 in /usr/sbin/eventum-cvs-hook on line 50
PHP Notice: Undefined offset: 2 in /usr/sbin/eventum-cvs-hook on line 50
PHP Notice: Undefined offset: 1 in /usr/sbin/eventum-cvs-hook on line 50
Directory /usr/local/cvs/test added to the repository