fix: fixed ammo count on magazines

Plugin/Extensions/ItemExtensions.cs

@@ -77,6 +77,12 @@ namespace LootValueEX.Extensions
                     if (item.TryGetItemComponent(out MedKitComponent medKitComponent))
                         return medKitComponent.HpResource;
                     return -1f;
+                case MagazineTemplate:
+                    MagazineClass? magazineClass = item as MagazineClass;
+                    return magazineClass != null ? magazineClass.Count : -1f;
+                case AmmoBoxTemplate:
+                    AmmoBox? ammoBox = item as AmmoBox;
+                    return ammoBox != null ? ammoBox.Count : -1f;
                 default:
                     return -1f;
             }