Add ItemColors mixin as well

Related: #59

src/main/java/org/embeddedt/modernfix/mixin/safety/BlockColorsMixin.java

@@ -16,11 +16,11 @@ import java.util.concurrent.locks.ReentrantLock;
 public class BlockColorsMixin {
     private Lock mapLock = new ReentrantLock();
     @Inject(method = "register", at = @At("HEAD"))
-    private void lockMapBeforeAccess(BlockColor pBlockColor, Block[] pBlocks, CallbackInfo ci) {
+    private void lockMapBeforeAccess(CallbackInfo ci) {
         mapLock.lock();
     }
     @Inject(method = "register", at = @At("TAIL"))
-    private void unlockMap(BlockColor pBlockColor, Block[] pBlocks, CallbackInfo ci) {
+    private void unlockMap(CallbackInfo ci) {
         mapLock.unlock();
     }
 }

src/main/java/org/embeddedt/modernfix/mixin/safety/ItemColorsMixin.java

@@ -0,0 +1,23 @@
+package org.embeddedt.modernfix.mixin.safety;
+
+import net.minecraft.client.color.item.ItemColors;
+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 java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+@Mixin(value = ItemColors.class, priority = 700)
+public class ItemColorsMixin {
+    private Lock mapLock = new ReentrantLock();
+    @Inject(method = "register", at = @At("HEAD"))
+    private void lockMapBeforeAccess(CallbackInfo ci) {
+        mapLock.lock();
+    }
+    @Inject(method = "register", at = @At("TAIL"))
+    private void unlockMap(CallbackInfo ci) {
+        mapLock.unlock();
+    }
+}

src/main/resources/modernfix.mixins.json

@@ -98,6 +98,7 @@
     "perf.async_jei.RecipeManagerInternalMixin",
     "perf.thread_priorities.IntegratedServerMixin",
     "safety.BlockColorsMixin",
+    "safety.ItemColorsMixin",
     "perf.flatten_model_predicates.AndConditionMixin",
     "perf.flatten_model_predicates.OrConditionMixin",
     "perf.flatten_model_predicates.PropertyValueConditionMixin",