Fix unintentional item combining for blocks missing setHasSubtypes(true) (#98)

src/main/java/binnie/core/block/ItemMetadata.java

@@ -17,6 +17,8 @@ public class ItemMetadata extends ItemBlock {
 
     public ItemMetadata(Block block) {
         super(block);
+        setMaxDamage(0);
+        setHasSubtypes(true);
     }
 
     @Override

src/main/java/binnie/extratrees/block/ItemETSlab.java

@@ -22,8 +22,6 @@ public class ItemETSlab extends ItemMetadata {
         theHalfSlab = (BlockETSlab) ExtraTrees.blockSlab;
         doubleSlab = (BlockETSlab) ExtraTrees.blockDoubleSlab;
         isFullBlock = (block != theHalfSlab);
-        setMaxDamage(0);
-        setHasSubtypes(true);
     }
 
     @Override

src/main/java/binnie/extratrees/block/ItemETStairs.java

@@ -19,6 +19,8 @@ public class ItemETStairs extends ItemBlock {
         super(block);
         setCreativeTab(CreativeTabs.tabBlock);
         setUnlocalizedName("stairs");
+        setMaxDamage(0);
+        setHasSubtypes(true);
     }
 
     @Override