Read the weapon block from the cache template item_weapon

Range, speed, damage list and swing anims now come from
engine.parsers.objects.ItemTemplate.getWeapon(templateID). Non-weapons and
missing templates get an empty block, matching the legacy zero defaults.

Offline parity (scripts/p15b.py, 811 WEAPON rows vs COBJECTS/ITEM): 0
differences in speed, range, projectile, idle anim, damage list or either
anim list. No duplicate damage types exist, so sum vs first is moot; first
entry is used as before. 26 weapons (ammo, lutes, no-stats crossbows) have an
empty damage list, same as the DB. No value changes. No comparator removed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/parsers/objects/ItemTemplate.java

@@ -33,6 +33,9 @@ public class ItemTemplate implements CObjectTemplate {
 
     public static HashMap<Integer, ItemTemplate> _items = new HashMap<>();
 
+    // Legacy templates zero-filled the weapon block on non-weapons; held shields and the like rely on it.
+    private static final Weapon NO_WEAPON = new Weapon();
+
     public int template_id;
 
     // obj_
@@ -463,6 +466,16 @@ public class ItemTemplate implements CObjectTemplate {
         return item_ignore_saved_actions;
     }
 
+    public static Weapon getWeapon(int templateID) {
+
+        ItemTemplate template = _items.get(templateID);
+
+        if (template == null || template.item_weapon == null)
+            return NO_WEAPON;
+
+        return template.item_weapon;
+    }
+
     // item_weapon (ArcAttackInfo_LoadWeapon, sb.exe 0x61FA60).
 
     public static class Weapon {