K&R patch for binutils bfd directory

[Andrew Cagney]

>    if (unit->error)
> -    return 0;
> +    return false;
>  
>    arange = &unit->arange;
>    do
>      {
>        if (addr >= arange->low && addr < arange->high)
> -	return 1;
> +	return true;
>        arange = arange->next;
>      }
>    while (arange);
>  
> -  return 0;
> +  return false;
>  }

Wasn't a BFD things-to-do-today thwack ``true'' and ``false''?  Someone 
is definitly ment to be removing them from bfd.h.

Andrew