[bug-gawk] gawk's configure fails to find size_t

[bugdal]

For some reason, gawk's configure script is testing for size_t (and
perhaps other types) with this code:

int
main ()
{
if (sizeof (($2)))
            return 0;
  ;
  return 0;
}

where $2 is replaced by size_t. This is always going to fail, since
sizeof((size_t)) is not valid C. The correct usage would be sizeof($2)
(i.e. sizeof(size_t)), but I'm not sure why sizeof is being used here
at all. Just declaring a variable of the type, as in:

int
main ()
{
$2 x;
  return 0;
}


should work just as well to test if the type is defined.