[Therion] extend hide

[Vasily Vl. Suhachev]

Hello

"extend hide" lead to enlarge white space in XVI image of my extended 
elevation. Difficult to locate xvi content on large blank grid

in small_part.th:

extend hide 16 at small_part 16_back at small_part

in thconfig:

unselect whole_cave
select small_part
export -fmt xvi

in XVI file:

   {      249.53       -50.00 15 at small_part}
   {      218.99       -46.85 16 at small_part}
   {      218.99       -46.85 16 at small_part}
   {      146.31       -55.71 17 at small_part}
   {    -7841.68     26268.31 16_back at small_part}
   {    -7841.68     26268.31 16 at small_part}
   {      146.31       -55.71 17 at small_part}
   {       72.30       -70.08 18 at small_part}
   {       72.30       -70.08 18 at small_part}


-- 
  WBR, Vasily