canRoll work

src/engine/objects/NPC.java

@@ -1065,9 +1065,13 @@ public class NPC extends AbstractCharacter {
                 break;
         }
         ItemTemplate itemTemplate;
+        int skillRequired = 0;
         for (Integer itemID : fullItemList) {
             itemTemplate = ItemTemplate.templates.get(itemID);
-            int skillRequired = itemTemplate.item_skill_required.values().iterator().next();
+
+            if(itemTemplate.item_skill_required.values().iterator().hasNext())
+                skillRequired = itemTemplate.item_skill_required.values().iterator().next();
+
             boolean exclude = skillRequired == 0 && ItemTemplate.templates.get(itemID).item_type.equals(ItemType.WEAPON);
             if (skillRequired <= maxSkill && !exclude)
                 filteredItemList.add(itemID);