Update Chunk.java

hopefully fixed Querz#95 on newer worlds

src/main/java/net/querz/mca/Chunk.java

@@ -70,10 +70,7 @@ private void initReferences(long loadFlags) {
 			return;
 		}
 
-		CompoundTag level;
-		if ((level = data.getCompoundTag("Level")) == null) {
-			throw new IllegalArgumentException("data does not contain \"Level\" tag");
-		}
+		CompoundTag level = data;
 		dataVersion = data.getInt("DataVersion");
 		inhabitedTime = level.getLong("InhabitedTime");
 		lastUpdate = level.getLong("LastUpdate");