transfer gt++ asm fix for COFH's OreDictionaryArbiter to mixins

src/main/java/com/mitchej123/hodgepodge/config/FixesConfig.java

@@ -425,6 +425,13 @@ public class FixesConfig {
     @Config.RequiresMcRestart
     public static boolean fixCandycraftBlockSugarNPE;
 
+    // Cofh
+
+    @Config.Comment("Fix NPE in COFH's oredict")
+    @Config.DefaultBoolean(true)
+    @Config.RequiresMcRestart
+    public static boolean fixCofhOreDictNPE;
+
     // Extra TiC
 
     @Config.Comment("Disable ExtraTic's Integration with Metallurgy 3 Precious Materials Module: (Brass, Silver, Electrum & Platinum)")

src/main/java/com/mitchej123/hodgepodge/mixins/Mixins.java

@@ -585,6 +585,9 @@ public enum Mixins {
             .addMixinClasses("thermalexpansion.MixinTileInventoryTileLightFalse")
             .addTargetedMod(TargetedMod.THERMALEXPANSION).setApplyIf(() -> ASMConfig.cofhWorldTransformer)
             .setPhase(Phase.LATE).setSide(Side.BOTH)),
+    FIX_ORE_DICT_NPE(new Builder("Fix NPE in OreDictionaryArbiter")
+            .addMixinClasses("cofhcore.MixinOreDictionaryArbiter").setPhase(Phase.EARLY).setSide(Side.BOTH)
+            .addTargetedMod(TargetedMod.COFH_CORE).setApplyIf(() -> FixesConfig.fixCofhOreDictNPE)),
 
     // Immersive engineering
     JAVA12_IMMERSIVE_ENGINERRING(new Builder("Immersive Engineering Java-12 safe potion array resizing")

src/main/java/com/mitchej123/hodgepodge/mixins/early/cofhcore/MixinOreDictionaryArbiter.java

@@ -0,0 +1,22 @@
+package com.mitchej123.hodgepodge.mixins.early.cofhcore;
+
+import net.minecraft.item.ItemStack;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import cofh.core.util.oredict.OreDictionaryArbiter;
+
+@Mixin(OreDictionaryArbiter.class)
+public class MixinOreDictionaryArbiter {
+
+    @Inject(method = "registerOreDictionaryEntry", at = @At("HEAD"), cancellable = true, remap = false)
+    private static void hodgepodge$fixNPE(ItemStack stack, String s, CallbackInfo ci) {
+        if (stack == null) {
+            ci.cancel();
+        }
+    }
+
+}