Supress harmless teleport error

nms-patches/PlayerConnection.patch

@@ -273,6 +273,15 @@
                  this.minecraftServer.getPlayerList().d(this.player);
                  this.player.checkMovement(this.player.locX - d0, this.player.locY - d1, this.player.locZ - d2);
                  this.D = d11 >= -0.03125D && !this.minecraftServer.getAllowFlight() && !worldserver.c(entity.getBoundingBox().g(0.0625D).b(0.0D, -0.55D, 0.0D));
+@@ -244,7 +436,7 @@
+ 
+     public void a(PacketPlayInTeleportAccept packetplayinteleportaccept) {
+         PlayerConnectionUtils.ensureMainThread(packetplayinteleportaccept, this, this.player.x());
+-        if (packetplayinteleportaccept.a() == this.teleportAwait) {
++        if (packetplayinteleportaccept.a() == this.teleportAwait && this.teleportPos != null) { // CraftBukkit
+             this.player.setLocation(this.teleportPos.x, this.teleportPos.y, this.teleportPos.z, this.player.yaw, this.player.pitch);
+             if (this.player.L()) {
+                 this.o = this.teleportPos.x;
 @@ -289,7 +481,7 @@
          } else {
              WorldServer worldserver = this.minecraftServer.getWorldServer(this.player.dimension);