[Pam-developers] Fix logical error in pam_time and pam_group

The attached patch fixes logical error in pam_time and pam_group as reported in GitHub issue #124 https://github.com/linux-pam/linux-pam/issues/124 OK to commit? -- Tomáš Mráz No matter how far down the wrong road you've gone, turn back. Turkish proverb [You'll know whether the road is wrong if you carefully listen to your conscience.]