re PR fortran/23677 (-fno-automatic does not accept legal save statements)

re PR fortran/23677 (-fno-automatic does not accept legal save statements)

	PR fortran/23677
	* symbol.c (gfc_is_var_automatic): Return true if character length
	is non-constant rather than constant.
	* resolve.c (gfc_resolve): Don't handle !gfc_option.flag_automatic
	here.
	* options.c (gfc_post_options): Set gfc_option.flag_max_stack_var_size
	to 0 for -fno-automatic.

	* gfortran.fortran-torture/execute/save_1.f90: New test.
	* gfortran.dg/save_1.f90: New test.

From-SVN: r104661