re PR fortran/32046 (wrong code with -O2 for gfortran.dg/interface_12.f90 & result_in...

re PR fortran/32046 (wrong code with -O2 for gfortran.dg/interface_12.f90 & result_in_spec_1.f90)

	PR fortran/32046
	* trans-expr.c (gfc_trans_zero_assign): Convert the result of
	TYPE_SIZE_UNIT into a signed type.
	(gfc_trans_array_copy):  Likewise.
	(gfc_trans_array_constructor_copy): Likewise.
	* trans-array.c (gfc_trans_create_temp_array): Likewise.
	(gfc_grow_array): Likewise.
	(gfc_array_init_size): Likewise.
	(gfc_duplicate_allocatable): Likewise.
	* trans-stmt.c (allocate_temp_for_forall_nest_1): Likewise.

From-SVN: r124985