stop deriving components if the map is somehow null to prevent crashing

src/main/java/io/wispforest/owo/mixin/ext/ItemStackMixin.java

@@ -35,21 +35,25 @@ private void injectDerivedComponentMap(ItemConvertible item, int count, Componen
     // TODO: for some reason mixin doesn't like it if I put all the injects in one method.
     @Inject(method = "<init>(Lnet/minecraft/item/ItemConvertible;ILnet/minecraft/component/ComponentMapImpl;)V", at = @At(value = "INVOKE", target = "Lnet/minecraft/item/Item;postProcessComponents(Lnet/minecraft/item/ItemStack;)V", shift = At.Shift.AFTER))
     private void deriveComponents1(ItemConvertible item, int count, ComponentMapImpl components, CallbackInfo ci) {
+        if (owo$derivedMap == null) return;
         owo$derivedMap.derive((ItemStack)(Object) this);
     }
 
     @Inject(method = "applyChanges", at = @At(value = "INVOKE", target = "Lnet/minecraft/item/Item;postProcessComponents(Lnet/minecraft/item/ItemStack;)V", shift = At.Shift.AFTER))
     private void deriveComponents2(ComponentChanges changes, CallbackInfo ci) {
+        if (owo$derivedMap == null) return;
         owo$derivedMap.derive((ItemStack)(Object) this);
     }
 
     @Inject(method = "applyUnvalidatedChanges", at = @At(value = "INVOKE", target = "Lnet/minecraft/item/Item;postProcessComponents(Lnet/minecraft/item/ItemStack;)V", shift = At.Shift.AFTER))
     private void deriveComponents3(ComponentChanges changes, CallbackInfo ci) {
+        if (owo$derivedMap == null) return;
         owo$derivedMap.derive((ItemStack)(Object) this);
     }
 
     @Inject(method = "applyComponentsFrom", at = @At(value = "INVOKE", target = "Lnet/minecraft/item/Item;postProcessComponents(Lnet/minecraft/item/ItemStack;)V", shift = At.Shift.AFTER))
     private void deriveComponents4(ComponentMap components, CallbackInfo ci) {
+        if (owo$derivedMap == null) return;
         owo$derivedMap.derive((ItemStack)(Object) this);
     }
 }