Add the ability to launch WitherSkulls. Fixes BUKKIT-3106

src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java

@@ -17,10 +17,13 @@ import net.minecraft.server.EntityLiving;
 import net.minecraft.server.EntitySmallFireball;
 import net.minecraft.server.EntitySnowball;
 import net.minecraft.server.EntityPlayer;
+import net.minecraft.server.EntityWitherSkull;
 import net.minecraft.server.MobEffect;
 import net.minecraft.server.MobEffectList;
 import net.minecraft.server.Packet42RemoveMobEffect;
 
+import org.apache.commons.lang.Validate;
+
 import org.bukkit.Location;
 import org.bukkit.block.Block;
 import org.bukkit.craftbukkit.CraftServer;
@@ -37,14 +40,12 @@ import org.bukkit.entity.Player;
 import org.bukkit.entity.Projectile;
 import org.bukkit.entity.SmallFireball;
 import org.bukkit.entity.Snowball;
-import org.bukkit.entity.Vehicle;
+import org.bukkit.entity.WitherSkull;
 import org.bukkit.potion.PotionEffect;
 import org.bukkit.potion.PotionEffectType;
 import org.bukkit.util.BlockIterator;
 import org.bukkit.util.Vector;
 
-import org.apache.commons.lang.Validate;
-
 public class CraftLivingEntity extends CraftEntity implements LivingEntity {
     public CraftLivingEntity(final CraftServer server, final EntityLiving entity) {
         super(server, entity);
@@ -279,6 +280,8 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
         } else if (Fireball.class.isAssignableFrom(projectile)) {
             if (SmallFireball.class.isAssignableFrom(projectile)) {
                 launch = new EntitySmallFireball(world);
+            } else if (WitherSkull.class.isAssignableFrom(projectile)) {
+                launch = new EntityWitherSkull(world);
             } else {
                 launch = new EntityLargeFireball(world);
             }