[FORTRAN] Use LOGICAL*1 for WHERE masks

[Tobias.Schlueter@Physik.Uni-Muenchen.DE]

Quoting Roger Sayle <roger@eyesopen.com>:
> Ok for mainline?

Yes,

thank you,
- Tobi

> 2006-02-05  Roger Sayle  <roger@eyesopen.com>
>
> 	* trans-stmt.c (gfc_evaluate_where_mask): Use LOGICAL*1 for WHERE
> 	masks instead of LOGICAL*4.