Some compilers warn about possible aliasing violations when we try to call pam_get_item() to retrieve the first password.
Some compilers warn about possible aliasing violations when we
try to call pam_get_item() to retrieve the first password.

Move type casts to work around this possible.

google/google-authenticator-libpam,google/google-authenticator-libpam,google/google-authenticator-libpam,google/google-authenticator-libpam