Fix command blocks

nms-patches/MinecraftServer.patch

@@ -1,5 +1,5 @@
---- ../work/decompile-8eb82bde//net/minecraft/server/MinecraftServer.java	2014-11-28 23:52:53.297215828 +0000
-+++ src/main/java/net/minecraft/server/MinecraftServer.java	2014-11-28 23:52:44.593216021 +0000
+--- ../work/decompile-8eb82bde//net/minecraft/server/MinecraftServer.java	2014-11-29 00:53:37.929134938 +0000
++++ src/main/java/net/minecraft/server/MinecraftServer.java	2014-11-29 00:52:46.133136087 +0000
 @@ -37,6 +37,18 @@
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
@@ -617,6 +617,15 @@
      }
  
      public static MinecraftServer getServer() {
+@@ -779,7 +1037,7 @@
+     }
+ 
+     public boolean N() {
+-        return this.universe != null;
++        return true; // CraftBukkit
+     }
+ 
+     public String getName() {
 @@ -835,8 +1093,10 @@
      }