Fix crash with disabled worlds

nms-patches/EntityPlayer.patch

@@ -355,20 +355,18 @@
              this.decouple();
              this.getWorldServer().removePlayer(this);
              if (!this.viewingCredits) {
-@@ -503,10 +697,12 @@
+@@ -503,8 +697,10 @@
          } else {
              WorldServer worldserver = this.server.getWorldServer(dimensionmanager1);
  
 -            this.dimension = dimensionmanager;
 +            // this.dimension = dimensionmanager; // CraftBukkit
              WorldServer worldserver1 = this.server.getWorldServer(dimensionmanager);
-             WorldData worlddata = worldserver1.getWorldData();
- 
 +            // CraftBukkit start
 +            /*
+             WorldData worlddata = worldserver1.getWorldData();
+ 
              this.playerConnection.sendPacket(new PacketPlayOutRespawn(dimensionmanager, WorldData.c(worlddata.getSeed()), worlddata.getType(), this.playerInteractManager.getGameMode()));
-             this.playerConnection.sendPacket(new PacketPlayOutServerDifficulty(worlddata.getDifficulty(), worlddata.isDifficultyLocked()));
-             PlayerList playerlist = this.server.getPlayerList();
 @@ -514,6 +710,8 @@
              playerlist.d(this);
              worldserver.removePlayer(this);