Fix regular members board permission
Fix regular members board permission

regular members group id = 0
$boardUpdateParameters['member_groups'] is a string containing group ids seperated by commas, so if we only check regular members we get 0 which doesn't pass the test for empty()

Signed-off-by: SychO <b4ec8103382ac021cb8faf454903ece5ab12ded9@gmail.com>

StealthWombat/SMF2.1-more-forkery,StealthWombat/SMF2.1-more-forkery