Fixed strongholds not generating properly.

src/main/java/com/volmit/iris/engine/jigsaw/PlannedStructure.java

@@ -98,7 +98,7 @@ public class PlannedStructure {
         int zz = i.getPosition().getZ() + sz;
         RNG rngf = new RNG(Cache.key(xx, zz));
         int offset = i.getPosition().getY() - startHeight;
-        int height = 0;
+        int height;
 
         if(i.getStructure().getStructure().getLockY() == -1) {
             if(i.getStructure().getStructure().getOverrideYRange() != null) {

src/main/java/com/volmit/iris/engine/mantle/EngineMantle.java

@@ -190,6 +190,7 @@ public interface EngineMantle extends IObjectPlacer {
 
     @ChunkCoordinates
     default void generateMatter(int x, int z, boolean multicore, ChunkContext context) {
+        synchronized(this) {
             if(!getEngine().getDimension().isUseMantle()) {
                 return;
             }
@@ -216,6 +217,7 @@ public interface EngineMantle extends IObjectPlacer {
 
             burst.complete();
         }
+    }
 
     default void generateMantleComponent(MantleWriter writer, int x, int z, MantleComponent c, MantleChunk mc, ChunkContext context) {
         mc.raiseFlag(c.getFlag(), () -> c.generateLayer(writer, x, z, context));

src/main/java/com/volmit/iris/util/mantle/Mantle.java

@@ -249,9 +249,9 @@ public class Mantle {
      */
     @ChunkCoordinates
     public <T> void iterateChunk(int x, int z, Class<T> type, Consumer4<Integer, Integer, Integer, T> iterator) {
-        if(!hasTectonicPlate(x >> 5, z >> 5)) {
+        /*if(!hasTectonicPlate(x >> 5, z >> 5)) {
             return;
-        }
+        }*/
 
         get(x >> 5, z >> 5).getOrCreate(x & 31, z & 31).iterate(type, iterator);
     }