Add the forgotten size test

src/ipc/zone/mod.rs

@@ -1071,6 +1071,16 @@ mod tests {
                     total_sale_cost: 0,
                 },
             ),
+            (
+                ServerZoneIpcType::ItemObtainedLogMessage,
+                ServerZoneIpcData::ItemObtainedLogMessage {
+                    event_id: 0,
+                    message_type: 0,
+                    params_count: 0,
+                    item_id: 0,
+                    item_quantity: 0,
+                },
+            ),
             (
                 ServerZoneIpcType::UpdateInventorySlot,
                 ServerZoneIpcData::UpdateInventorySlot {