trans-stmt.c (gfc_evaluate_where_mask): Allow the NMASK argument to be NULL to indicate that the not mask isn't required.
* trans-stmt.c (gfc_evaluate_where_mask): Allow the NMASK argument
to be NULL to indicate that the not mask isn't required.
(gfc_trans_where_2): Remove PMASK argument. Avoid calculating the
pending mask for the last clause of a WHERE chain. Update recursive
call.
(gfc_trans_forall_1): Update call to gfc_trans_where_2.
(gfc_trans_where): Likewise.