Fix water tint when level or player are null.

Author: LexManos

src/main/java/net/minecraftforge/lex/cfd/WaterItemTint.java

@@ -4,6 +4,8 @@
  */
 package net.minecraftforge.lex.cfd;
 
+import javax.annotation.Nullable;
+
 import com.mojang.serialization.MapCodec;
 
 import net.minecraft.client.color.item.ItemTintSource;
@@ -17,7 +19,8 @@ public record WaterItemTint() implements ItemTintSource {
     public static final MapCodec<WaterItemTint> CODEC = MapCodec.unit(() -> INSTANCE);
 
     @Override
-    public int calculate(ItemStack stack, ClientLevel level, LivingEntity entity) {
+    public int calculate(ItemStack stack, @Nullable ClientLevel level, @Nullable LivingEntity entity) {
+        if (level == null || entity == null) return CobbleForDays.PLAINS;
         return BiomeColors.getAverageWaterColor(level, entity.blockPosition());
     }