Apply setLastDamageCause after processing events and the event has not been canceled. Fixes BUKKIT-1881

This allows previous causes to be available during the event, as well as making the damage cause a valid one. If EntityDamageEvent is canceled, then it's not the last DamageCause.

Also prevents setting DamageCause involuntarily through construction.

src/main/java/net/minecraft/server/FoodMetaData.java

@@ -58,6 +58,7 @@ public class FoodMetaData {
                     entityhuman.world.getServer().getPluginManager().callEvent(event);
 
                     if (!event.isCancelled()) {
+                        event.getEntity().setLastDamageCause(event);
                         entityhuman.damageEntity(DamageSource.STARVE, event.getDamage());
                     }
                     // CraftBukkit end