add debugging code

src/main.lua

@@ -628,7 +628,7 @@ local function VP_createstack(buf, dimensions)
         for z=1,dimensions["z"],1 do
 
             local tempbuf = {}
-            for y=1,dimensions["y"]+1,1 do -- for each y dimension
+            for y=1,dimensions["y"],1 do -- for each y dimension
                 local placecode = buf[posasstring(x,y,z)]
                 for layer=1,3,1 do -- layers
                     table.insert(tempbuf, needstobeplaced(placecode, layer))
@@ -638,7 +638,7 @@ local function VP_createstack(buf, dimensions)
             end
             VP_optimizestack(tempbuf)
 
-            if #tempbuf > 0 then out[posasstring(x,z)] = tempbuf end
+            if #tempbuf > 0 then print("bugcheck");read();out[posasstring(x,z)] = tempbuf end
         end
     end