Schema Module Mismatching Tables

The Schema Module reports the below errors with Mail Logger. The posted patch fixes the issue for me.

• column subject - difference on: length
  declared: array('description' => 'TODO: please describe this field!', 'type' => 'varchar', 'length' => 2047, 'not null' => TRUE)
  actual: array('description' => 'Mail subject', 'type' => 'varchar', 'length' => '255', 'not null' => TRUE)
• column ipaddr - difference on: not null
  declared: array('description' => 'TODO: please describe this field!', 'type' => 'varchar', 'length' => 45)
  actual: array('description' => 'IP Address of User', 'type' => 'varchar', 'length' => '45', 'not null' => TRUE)
• indexes mailfrom:
  declared: array('mailfrom', '100')
  actual: array(array('mailfrom', 100))
• indexes mail_system: unexpected (not an error)