Fix not being able to open a chest when a Storage Drawer is above it. Closes #173

src/main/java/cpw/mods/ironchest/common/blocks/chest/BlockIronChest.java

@@ -124,7 +124,7 @@ public class BlockIronChest extends Block
             return true;
         }
 
-        if (worldIn.isSideSolid(pos.add(0, 1, 0), EnumFacing.DOWN))
+        if (worldIn.getBlockState(pos.up()).doesSideBlockChestOpening(worldIn, pos.up(), EnumFacing.DOWN))
         {
             return true;
         }