selinux: use int arrays for boolean values

Do not cast pointers of signed integers to pointers of unsigned integers
and vice versa.

It should currently not be an issue since they hold SELinux boolean
values which should only contain either 0's or 1's, which should have
the same representation.

Reported by sparse:

  .../selinuxfs.c:1485:30: warning: incorrect type in assignment
                                    (different signedness)
  .../selinuxfs.c:1485:30:    expected unsigned int *
  .../selinuxfs.c:1485:30:    got int *[addressable] values
  .../selinuxfs.c:1402:48: warning: incorrect type in argument 3
                                    (different signedness)
  .../selinuxfs.c:1402:48:    expected int *values
  .../selinuxfs.c:1402:48:    got unsigned int *bool_pending_values

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
[PM: minor whitespace fixes, sparse output cleanup]
Signed-off-by: Paul Moore <paul@paul-moore.com>