This patch resolves Login link issue for Forums.
I used @catch suggestion at...

This patch resolves Login link issue for Forums.

I used @catch suggestion at #40 and added user_role_has_permission($rid, $permission) in user module.

I also made changes in comment module to use user_role_has_permission instead of user_roles which IMO seems more performant then user_roles which is currently being used in comment module. user_roles uses join query while user_role_permissions uses query without join.

cheers