[Tickrate] Fixed error in singleplayer

Author: ScribbleTAS

src/main/java/com/minecrafttas/tasmod/savestates/SavestateHandlerClient.java

@@ -222,7 +222,7 @@ public static void loadstate(String nameOfSavestate) throws Exception {
 			 * 
 			 * We expect to start at tick 10 WITHOUT clearing the controller.
 			 * If we were to replace the controller, everything above tick 10 would be lost.
-			 * So we only set the index to 10, preload and preload the inputs.
+			 * So we only set the index to 10 and preload the inputs.
 			 * 
 			 *            VV
 			 *  0         10       20

src/main/java/com/minecrafttas/tasmod/savestates/handlers/SavestatePlayerHandler.java

@@ -152,7 +152,6 @@ public void loadAndSendMotionToPlayer() {
 	public void changeDimensionDangerously(EntityPlayerMP player, int dimensionTo) {
 		int dimensionFrom = player.dimension;
 		WorldServer worldServerFrom = this.server.getWorld(dimensionFrom);
-//		WorldServer worldServerTo = this.server.getWorld(dimensionTo);
 
 		//@formatter:off
 		player.connection
@@ -167,10 +166,6 @@ public void changeDimensionDangerously(EntityPlayerMP player, int dimensionTo) {
 		//@formatter:on
 		worldServerFrom.removeEntityDangerously(player);
 		player.isDead = false;
-//		worldServerTo.spawnEntity(player);
-//		worldServerTo.updateEntityWithOptionalForce(player, false);
-//		player.setWorld(worldServerTo);
-//		player.interactionManager.setWorld(worldServerTo);
 	}
 
 	public void clearScoreboard() {

src/main/java/com/minecrafttas/tasmod/tickratechanger/TickrateChangerServer.java

@@ -208,7 +208,7 @@ private void advanceServerTick() {
 	 */
 	@Override
 	public void onClientCompleteAuthentication(String username) {
-		if (TASmod.getServerInstance().isDedicatedServer()) {
+		if (TASmod.getServerInstance() != null && TASmod.getServerInstance().isDedicatedServer()) {
 			log("Sending the current tickrate (" + ticksPerSecond + ") to " + username);
 
 			try {