[ping] account for register spans in expand_builtin_init_dwarf_reg_sizes

[Jason Merrill]

On 11/24/2014 03:08 AM, Olivier Hainque wrote:
> +  if (init_state->processed_regno[regno])
> +    return;

I would expect this to go in the loop in 
expand_builtin_init_dwarf_reg_sizes, before we look up a span for the 
regno.  OK with that change.

Jason