Made hack-wish stack properly.

scripts/gui/hack-wish.lua

@@ -190,8 +190,13 @@ function hackWish(unit)
   if args.multi then
    repeat amountok,amount=script.showInputPrompt('Wish','How many do you want? (numbers only!)',COLOR_LIGHTGREEN) until tonumber(amount)
     if mattype and itemtype then
-     for i=1,tonumber(amount) do
-      createItem({mattype,matindex},{itemtype,itemsubtype},quality,unit,description)
+     if df.item_type.attrs[itemtype].is_stackable then
+      local proper_item=df.item.find(dfhack.items.createItem(itemtype, itemsubtype, mattype, matindex, unit))
+      proper_item:setStackSize(amount)
+     else
+      for i=1,amount do
+       dfhack.items.createItem(itemtype, itemsubtype, mattype, matindex, unit)
+      end
      end
     end
   else