do not remove faraway treasures in 3D geometries (they are not that far away...)

environment.cpp

@@ -357,7 +357,7 @@ EX void bfs() {
         
         // remove treasures
         if(!peace::on && c2->item && c2->cpdist == distlimit && itemclass(c2->item) == IC_TREASURE &&
-          c2->item != itBabyTortoise &&
+          c2->item != itBabyTortoise && WDIM != 3 &&
           (items[c2->item] >= (ls::any_chaos()?10:20) + currentLocalTreasure || getGhostcount() >= 2)) {
             c2->item = itNone;
             if(c2->land == laMinefield) { c2->landparam &= ~3; }