Compilation error fixes

patches/server/Optimise-random-block-ticking.patch

@@ -26,9 +26,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@
 +package io.papermc.paper.util.math;
 +
++import net.minecraft.util.RandomSource;
++import net.minecraft.world.level.levelgen.PositionalRandomFactory;
++
 +import java.util.Random;
 +
-+public final class ThreadUnsafeRandom extends Random {
++public final class ThreadUnsafeRandom extends Random implements RandomSource {
 +
 +    // See javadoc and internal comments for java.util.Random where these values come from, how they are used, and the author for them.
 +    private static final long multiplier = 0x5DEECE66DL;
@@ -42,6 +45,21 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    private long seed;
 +
 +    @Override
++    public RandomSource fork() {
++        return new ThreadUnsafeRandom();
++    }
++
++    @Override
++    public PositionalRandomFactory forkPositional() {
++        throw new UnsupportedOperationException();
++    }
++
++    @Override
++    public int nextInt(int origin, int bound) {
++        return RandomSource.super.nextInt(origin, bound);
++    }
++
++    @Override
 +    public void setSeed(long seed) {
 +        // note: called by Random constructor
 +        this.seed = initialScramble(seed);