Port to 1.11

src/main/java/appeng/tile/inventory/AppEngNullInventory.java

@@ -92,7 +92,7 @@ public class AppEngNullInventory implements IInventory
 	}
 
 	@Override
-	public boolean isUseableByPlayer( final EntityPlayer var1 )
+	public boolean isUsableByPlayer( final EntityPlayer var1 )
 	{
 		return false;
 	}
@@ -144,4 +144,10 @@ public class AppEngNullInventory implements IInventory
 	{
 
 	}
+
+	@Override
+	public boolean isEmpty()
+	{
+		return true;
+	}
 }