Dispatch is not checking if perm is a function

[crypto-vault]

Dispatch is not checking if perm is a function making the view return always a 403 permission denied.

The following example should always grant permission but throws a 403 in detail view.

def myperm_system(user, view):
    return True

perms = { 'create': [],
          'list': [],
          'delete': [],
          'update': [],
          'detail': [myperm_system]
        }

The problem is in line 166 of crud.py:

    for perm in self.perms:
        if not request.user.has_perm(perm):
            return HttpResponseForbidden()

It should be:

    for perm in self.perms:
        if not self.validate_user_perms(request.user, perm, self.view_type):
            return HttpResponseForbidden()