Fix notice for: 'Undefined variable: logger'

After last update, got this notice:

PHP Notice:  Undefined variable: logger in vendor/chrisboulton/php-resque/bin/resque on line 64
PHP Stack trace:
PHP   1. {main}() vendor/chrisboulton/php-resque/bin/resque:0

Notice: Undefined variable: logger in vendor/chrisboulton/php-resque/bin/resque on line 64

Call Stack:
    0.0003     246720   1. {main}() vendor/chrisboulton/php-resque/bin/resque:0