fix: add liquid to Forestry Carpenters internal tank filter, so new liquids are accepted

this time via relfection and hopefully working
modified:   src/main/java/modtweaker/mods/forestry/ForestryHelper.java
modified:   src/main/java/modtweaker/mods/forestry/handlers/Carpenter.java

src/main/java/modtweaker/mods/forestry/ForestryHelper.java

@@ -1,5 +1,29 @@
 package modtweaker.mods.forestry;
 
+import java.lang.reflect.Field;
+import java.util.HashSet;
+
+import net.minecraftforge.fluids.Fluid;
+
 public class ForestryHelper {
 
+	@SuppressWarnings("unchecked")
+	public static void addCarpenterRecipeFluids(Fluid newFluid) {
+		Class clazz;
+		try {
+			clazz = Class.forName("forestry.factory.gadgets.MachineCarpenter$RecipeManager");
+			Field field_recipeFluids = clazz.getDeclaredField("recipeFluids");
+			field_recipeFluids.setAccessible(true);
+			
+			HashSet<Fluid> recipeFluids = (HashSet<Fluid>) field_recipeFluids.get(clazz);
+			recipeFluids.add(newFluid);
+
+		} catch (ClassNotFoundException e) {
+			e.printStackTrace();
+		} catch (NoSuchFieldException e) {
+			e.printStackTrace();
+		} catch (IllegalAccessException e) {
+			e.printStackTrace();
+		}
+	}
 }

src/main/java/modtweaker/mods/forestry/handlers/Carpenter.java

@@ -28,6 +28,8 @@ import forestry.factory.gadgets.MachineFermenter;
 import forestry.factory.gadgets.MachineCarpenter.Recipe;
 import forestry.factory.gadgets.MachineCarpenter.RecipeManager;
 
+import modtweaker.mods.forestry.ForestryHelper;
+
 @ZenClass("mods.forestry.Carpenter")
 public class Carpenter {
 
@@ -52,9 +54,13 @@ public class Carpenter {
 	}
 
 	private static class Add extends BaseListAddition {
+
 		public Add(Recipe recipe) {
 			super("Forestry Carpenter", MachineCarpenter.RecipeManager.recipes, recipe);
-			RecipeManager.recipeFluids.add(recipe.getLiquid().getFluid());
+			
+			//The Carpenter has a list of valid Fluids, access them via Relfection because of private
+			if (recipe.getLiquid() != null)
+				ForestryHelper.addCarpenterRecipeFluids(recipe.getLiquid().getFluid());
 		}
 	}