libselinux: return EINVAL if invalid role selected

For get_default_context_with_role(3) and get_default_context_with_rolelevel(3),
return errno = EINVAL if invalid role.

Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
1 file changed