huth map 61

Gridmapper:huth map 61: Fix a diagonal tile

(15,1)f         f
       f f f f f f f f f f

      ffffffffffffffffffff
      ffffffffffffffffffff
      ffffnnn     nnnn ffffffffff
      fffnnn n ffffnn nnnn fffffffff
      ffnnn n fnvv wwfwwfnnvv fnn nnnn ffffffff
      ff fnvv ffffnnvv f ffffffff
      ff fwffffffwf fnnn   nnnn fff
      ff fwfffffsssv wf nnn n ffnn nnnn ff
      ff fnnvv ffffwfffdfffff ff
      ffnn nnnn fnnvv ffnvv fnnn   ffff ff
      fffnn nnnn fwwfwwffnnn n fnn nnnn ffnnn n ff
      ffffnn     n nnvv ffnn f n fff
      fffff ffw.wfnnvv fnnvv ffw.dfwfffff
      fffff ffwffnnvv fnnvv fwfwfffff
      fff ssvvvv fdvvv.wfwwffffw.dfwwfddfwfwfffff
      fff  ffffffdfffwfwfffff
      fffff wwfwwfwffnvv ddfwwnnvv ddfwfwfffff
      fffff ffwfnnnvv ffnnn ww ddfnnnn ffff
      ffffnnn  sssv wfd.dfnnvv fnnn n ffnn nnnn fff
      fffnnn n fddfnn nnnn fwwssv dfffff fff
      fff fffffwwfwwffffff fff
      fff ffff wwfwwfnn nnnn ffnnn n fff
      fffnn nnnn ffnnn n fffnn   n ffff
      ffffnn   n ffffffffffff
      ffffffffffffffffffff
      ffffffffffffffffffff(29,18,0)