Fixed an issue where Parts/Blocks would not properly identify them selves with the proper ItemStack.

core/features/ItemStackSrc.java

@@ -0,0 +1,33 @@
+package appeng.core.features;
+
+import net.minecraft.block.Block;
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+
+public class ItemStackSrc
+{
+
+	public final Item item;
+	public final Block block;
+	public final int damage;
+
+	public ItemStackSrc(Item i, int dmg) {
+		block = null;
+		item = i;
+		damage = dmg;
+	}
+
+	public ItemStackSrc(Block b, int dmg) {
+		item = null;
+		block = b;
+		damage = dmg;
+	}
+
+	public ItemStack stack(int i)
+	{
+		if ( block != null )
+			return new ItemStack( block, i, damage );
+		return new ItemStack( item, i, damage );
+	}
+
+}