8bd09f7fc0
When Minecraft 1.7 was released, Acacia and Dark Oak Stairs were added. While Bukkit added them to Material.java, it did not add the MaterialData mapping of them to Stairs.class. Currently getAscendingDirection() and other stair-specific functions can not be used on these new stairs. This commit fixes that by adding the mapping needed. Pulled from PR #977 By: Peter Olson <peter.olson@gmail.com>