Move one condition out of gfc_trans_scalar_assign

Move one condition out of gfc_trans_scalar_assign

	* trans.h (gfc_trans_scalar_assign): Remove fourth argument.
	* trans-expr.c (gfc_trans_scalar_assign): Merge fourth into sixth
	argument.
	(gfc_conv_subref_array_arg, gfc_trans_subarray_assign,
	 gfc_trans_subcomponent_assign, gfc_trans_assignment_1): Update callers.
	* trans-array.c (gfc_conv_expr_descriptor): Ditto.
	* trans-stmt.c (forall_make_variable_temp,
	generate_loop_for_temp_to_lhs, generate_loop_for_rhs_to_temp,
	gfc_trans_where_assign, gfc_trans_where_3): Ditto.

From-SVN: r226700