Fix potential null pointers in DhWorld shutdown

core/src/main/java/com/seibel/distanthorizons/core/level/DhClientServerLevel.java

@@ -32,7 +32,6 @@ public class DhClientServerLevel extends DhLevel implements IDhClientLevel, IDhS
 	public final ClientLevelModule clientside;
 	
 	private final IServerLevelWrapper serverLevelWrapper;
-	public IClientLevelWrapper clientLevelWrapper;
 	
 	
 	
@@ -109,11 +108,7 @@ public class DhClientServerLevel extends DhLevel implements IDhClientLevel, IDhS
 		clientside.startRenderer();
 	}
 	
-	public void stopRenderer()
-	{
-		clientside.stopRenderer();
-		clientLevelWrapper = null;
-	}
+	public void stopRenderer() { this.clientside.stopRenderer(); }
 	
 	//================//
 	// level handling //

core/src/main/java/com/seibel/distanthorizons/core/world/DhClientServerWorld.java

@@ -144,7 +144,14 @@ public class DhClientServerWorld extends AbstractDhWorld implements IDhClientWor
 		for (DhClientServerLevel level : this.dhLevels)
 		{
 			LOGGER.info("Unloading level " + level.getServerLevelWrapper().getDimensionType().getDimensionName());
-			level.clientLevelWrapper.onUnload();
+			
+			// level wrapper shouldn't be null, but just in case
+			IServerLevelWrapper serverLevelWrapper = level.getServerLevelWrapper();
+			if (serverLevelWrapper != null)
+			{
+				serverLevelWrapper.onUnload();
+			}
+			
 			level.close();
 		}
 		

core/src/main/java/com/seibel/distanthorizons/core/world/DhClientWorld.java

@@ -15,6 +15,7 @@ import com.seibel.distanthorizons.core.util.objects.EventLoop;
 import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftClientWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.IClientLevelWrapper;
 import com.seibel.distanthorizons.core.wrapperInterfaces.world.ILevelWrapper;
+import com.seibel.distanthorizons.core.wrapperInterfaces.world.IServerLevelWrapper;
 
 import java.io.File;
 import java.util.concurrent.CompletableFuture;
@@ -167,6 +168,14 @@ public class DhClientWorld extends AbstractDhWorld implements IDhClientWorld
 		for (DhClientLevel dhClientLevel : this.levels.values())
 		{
 			LOGGER.info("Unloading level " + dhClientLevel.getLevelWrapper().getDimensionType().getDimensionName());
+			
+			// level wrapper shouldn't be null, but just in case
+			IClientLevelWrapper clientLevelWrapper = dhClientLevel.getClientLevelWrapper();
+			if (clientLevelWrapper != null)
+			{
+				clientLevelWrapper.onUnload();
+			}
+			
 			dhClientLevel.close();
 		}
 		

core/src/main/java/com/seibel/distanthorizons/core/world/DhServerWorld.java

@@ -182,6 +182,14 @@ public class DhServerWorld extends AbstractDhWorld implements IDhServerWorld
 		for (DhServerLevel level : this.levels.values())
 		{
 			LOGGER.info("Unloading level " + level.getLevelWrapper().getDimensionType().getDimensionName());
+			
+			// level wrapper shouldn't be null, but just in case
+			IServerLevelWrapper serverLevelWrapper = level.getServerLevelWrapper();
+			if (serverLevelWrapper != null)
+			{
+				serverLevelWrapper.onUnload();
+			}
+			
 			level.close();
 		}