Entity audit. Adds checks for null entities, and adds conformity.

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

@@ -2,10 +2,10 @@ package net.minecraft.server;
 
 import java.util.Random;
 
-//CraftBukkit start
+// CraftBukkit start
 import org.bukkit.craftbukkit.CraftServer;
 import org.bukkit.craftbukkit.entity.CraftCreeper;
-//CraftBukkit end
+// CraftBukkit end
 
 public class EntityCreeper extends EntityMobs {
 
@@ -15,10 +15,10 @@ public class EntityCreeper extends EntityMobs {
     public EntityCreeper(World world) {
         super(world);
         aP = "/mob/creeper.png";
-        //CraftBukkit start
+        // CraftBukkit start
         CraftServer server = ((WorldServer) this.l).getServer();
         this.bukkitEntity = new CraftCreeper(server, this);
-        //CraftBukkit end
+        // CraftBukkit end
     }
 
     protected void a() {