Added missing Override annotations

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

@@ -52,6 +52,7 @@ public class AppEngInternalAEInventory implements IInventory, Iterable<ItemStack
 		this.inv = new IAEItemStack[s];
 	}
 
+	@Override
 	public boolean isEmpty()
 	{
 		for( int x = 0; x < this.size; x++ )

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

@@ -48,6 +48,7 @@ public class AppEngInternalInventory implements IInventory, Iterable<ItemStack>
 		this.inv = new ItemStack[size];
 	}
 
+	@Override
 	public boolean isEmpty()
 	{
 		for( int x = 0; x < this.size; x++ )