Fix Set reg_attrs for function parameters passed in registers

[Richard Henderson]

On Thu, Feb 27, 2003 at 06:28:16PM +0100, Josef Zlomek wrote:
> +       for (i = 0; i < XVECLEN (parm_rtx, 0); i++)
> + 	{
> + 	  rtx x = XVECEXP (parm_rtx, 0, i);

The first entry of the parallel may be null; 
see emit_group_load.


r~