Fix decorator issues

src/main/java/com/volmit/iris/generator/decorator/IrisSeaFloorDecorator.java

@@ -23,9 +23,12 @@ public class IrisSeaFloorDecorator extends IrisEngineDecorator
             if(decorator != null)
             {
                 if(!decorator.isStacking())
+                {
+                    if(height >= 0 || height < getEngine().getHeight())
                     {
                         data.set(x, height, z, decorator.getBlockData100(biome, getRng(), realX, realZ, getData()));
                     }
+                }
                 else
                 {
                     int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
@@ -36,6 +39,16 @@ public class IrisSeaFloorDecorator extends IrisEngineDecorator
 
                     for(int i = 0; i < stack; i++)
                     {
+                        if(height - i < 0 || height - i > getEngine().getHeight())
+                        {
+                            continue;
+                        }
+
+                        if(height+i > getDimension().getFluidHeight())
+                        {
+                            continue;
+                        }
+
                         double threshold = ((double)i) / (stack - 1);
                         data.set(x, height+i, z, threshold >= decorator.getTopThreshold() ? top : fill);
                     }

src/main/java/com/volmit/iris/generator/decorator/IrisSeaSurfaceDecorator.java

@@ -21,9 +21,13 @@ public class IrisSeaSurfaceDecorator extends IrisEngineDecorator
         if(decorator != null)
         {
             if(!decorator.isStacking())
+            {
+                if(height >= 0 || height < getEngine().getHeight())
                 {
                     data.set(x, getDimension().getFluidHeight()+1, z, decorator.getBlockData100(biome, getRng(), realX, realZ, getData()));
                 }
+            }
+
             else
             {
                 int stack = decorator.getHeight(getRng().nextParallelRNG(Cache.key(realX, realZ)), realX, realZ, getData());
@@ -32,6 +36,11 @@ public class IrisSeaSurfaceDecorator extends IrisEngineDecorator
                 BlockData fill = decorator.getBlockData100(biome, getRng(), realX, realZ, getData());
                 for(int i = 0; i < stack; i++)
                 {
+                    if(height - i < 0 || height - i > getEngine().getHeight())
+                    {
+                        continue;
+                    }
+
                     double threshold = ((double)i) / (stack - 1);
                     data.set(x, getDimension().getFluidHeight() + 1 + i, z, threshold >= decorator.getTopThreshold() ? top : fill);
                 }

src/main/java/com/volmit/iris/generator/decorator/IrisSurfaceDecorator.java

@@ -80,12 +80,17 @@ public class IrisSurfaceDecorator extends IrisEngineDecorator
 
                     if(bd == null)
                     {
-                        return;
+                        break;
                     }
 
                     if(i == 0 && !underwater && !canGoOn(bd, bdx))
                     {
-                        return;
+                        break;
+                    }
+
+                    if(underwater && height + 1 + i > getDimension().getFluidHeight())
+                    {
+                        break;
                     }
 
                     data.set(x, height+1+i, z, bd);