Don't call pam_strerror() after pam_end()
Don't call pam_strerror() after pam_end()

The pam_handle_t (PamHandle) is invalid after pam_end(). Linux-PAM's
pam_strerror() doesn't actually use the handle, but better safe than
sorry.

FirefighterBlu3/python-pam,FirefighterBlu3/python-pam