trans-stmt.c (gfc_evaluate_where_mask): Allow the NMASK argument to be NULL to indica...

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.

From-SVN: r110659