Fix locateNearestBiome nullability check (#8662)

patches/server/More-World-API.patch

@@ -21,8 +21,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    @Override
 +    public Location locateNearestBiome(Location origin, Biome biome, int radius, int step) {
 +        BlockPos originPos = new BlockPos(origin.getX(), origin.getY(), origin.getZ());
-+        BlockPos nearest = getHandle().findClosestBiome3d( holder -> holder.is(CraftNamespacedKey.toMinecraft(biome.getKey())), originPos, radius, step, step).getFirst();
-+        return (nearest == null) ? null : new Location(this, nearest.getX(), nearest.getY(), nearest.getZ());
++        Pair<BlockPos, Holder<net.minecraft.world.level.biome.Biome>> pair = getHandle().findClosestBiome3d(holder -> holder.is(CraftNamespacedKey.toMinecraft(biome.getKey())), originPos, radius, step, step);
++        if (pair == null) {
++            return null;
++        }
++        BlockPos nearest = pair.getFirst();
++        return new Location(this, nearest.getX(), nearest.getY(), nearest.getZ());
 +    }
 +
 +    @Override