Relocate Source to proper directory.

src/main/java/appeng/container/slot/OptionalSlotRestrictedInput.java

@@ -0,0 +1,28 @@
+package appeng.container.slot;
+
+import net.minecraft.entity.player.InventoryPlayer;
+import net.minecraft.inventory.IInventory;
+
+public class OptionalSlotRestrictedInput extends SlotRestrictedInput
+{
+
+	final int groupNum;
+	IOptionalSlotHost host;
+
+	public OptionalSlotRestrictedInput(PlacableItemType valid, IInventory i, IOptionalSlotHost host, int slotnum, int x, int y, int grpNum,
+			InventoryPlayer invPlayer) {
+		super( valid, i, slotnum, x, y, invPlayer );
+		this.groupNum = grpNum;
+		this.host = host;
+	}
+
+	@Override
+	public boolean isEnabled()
+	{
+		if ( host == null )
+			return false;
+
+		return host.isSlotEnabled( groupNum );
+	}
+
+}