using kotlin's newfangled 'x in xs.indices' instead of 'x in 0 until xs.size'

src/net/torvald/terrarum/modulebasegame/ui/UIInventory.kt

@@ -307,7 +307,7 @@ package net.torvald.terrarum.modulebasegame.ui
             inventorySortList.sortBy { it.item.name }
 
             // map sortList to item list
-            for (k in 0 until items.size) {
+            for (k in items.indices) {
                 // we have an item
                 try {
                     val sortListItem = inventorySortList[k + itemPage * items.size]

src/net/torvald/terrarum/modulebasegame/ui/UIItemInventoryDynamicList.kt

@@ -353,7 +353,7 @@ class UIItemInventoryDynamicList(
         inventorySortList.sortBy { ItemCodex[it.item]!!.name }
 
         // map sortList to item list
-        for (k in 0 until items.size) {
+        for (k in items.indices) {
             // we have an item
             try {
                 val sortListItem = inventorySortList[k + itemPage * items.size]
@@ -372,7 +372,7 @@ class UIItemInventoryDynamicList(
                 }
 
                 // set equippedslot number
-                for (eq in 0 until inventory.itemEquipped.size) {
+                for (eq in inventory.itemEquipped.indices) {
                     if (eq < inventory.itemEquipped.size) {
                         if (inventory.itemEquipped[eq] == items[k].item?.dynamicID) {
                             items[k].equippedSlot = eq

src/net/torvald/terrarum/modulebasegame/ui/UIItemInventoryEquippedView.kt

@@ -118,7 +118,7 @@ class UIItemInventoryEquippedView(
         // sort by equip position
 
         // fill the grid from fastest index, make no gap in-between of slots
-        for (k in 0 until itemGrid.size) {
+        for (k in itemGrid.indices) {
             val item = inventory.itemEquipped[k]
 
             if (item == null) {