[libiberty] don't demangle functions named "."

[Jim Blandy]

Thiago Jung Bauermann <bauerman at br.ibm.com> writes:
> @@ -2513,10 +2510,12 @@ iterate_demangle_function (struct work_s
>  
>    while (scan[2])
>      {
> -      demangle_function_name (work, mangled, declp, scan);
> -      success = demangle_signature (work, mangled, declp);
> -      if (success)
> -	break;
> +      if (demangle_function_name (work, mangled, declp, scan))
> +	{
> +	  success = demangle_signature (work, mangled, declp);
> +	  if (success)
> +	    break;
> +	}
>  
>        /* Reset demangle state for the next round.  */
>        *mangled = mangle_init;

Why not simply:

      if (demangle_function_name (work, mangled, declp, scan)
          && demangle_signature (work, mangled, declp))
        break;