[Client] Add items required for item magic casting when they are missing

apps/openmw/mwmp/MechanicsHelper.cpp

@@ -393,19 +393,15 @@ void MechanicsHelper::processAttack(Attack attack, const MWWorld::Ptr& attacker)
                 break;
         }
 
-        if (it != inventoryStore.end())
-        {
+        // Add the item if it's missing
+        if (it == inventoryStore.end())
+            it = attacker.getClass().getContainerStore(attacker).add(attack.itemId, 1, attacker);
+
         inventoryStore.setSelectedEnchantItem(it);
         LOG_APPEND(Log::LOG_VERBOSE, "- itemId: %s", attack.itemId.c_str());
         MWBase::Environment::get().getWorld()->castSpell(attacker);
         inventoryStore.setSelectedEnchantItem(inventoryStore.end());
     }
-        else
-        {
-            LOG_MESSAGE_SIMPLE(Log::LOG_ERROR, "Could not find item %s used by %s to cast item spell!",
-                attack.itemId.c_str(), attacker.getCellRef().getRefId().c_str());
-        }
-    }
 }
 
 bool MechanicsHelper::doesEffectListContainEffect(const ESM::EffectList& effectList, short effectId, short attributeId, short skillId)