Allow server startup for those poor people running <1G Xmx

Clamp logic for poolsize so we dont pass zero

Spigot-Server-Patches/Optimize-NibbleArray-to-use-pooled-buffers.patch

@@ -97,7 +97,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    // Paper start
 +    public static byte[] EMPTY_NIBBLE = new byte[2048];
 +    private static final int nibbleBucketSizeMultiplier = Integer.getInteger("Paper.nibbleBucketSize", 3072);
-+    private static final int maxPoolSize = Integer.getInteger("Paper.maxNibblePoolSize", (int) Math.min(6, Runtime.getRuntime().maxMemory() / 1024 / 1024 / 1024) * (nibbleBucketSizeMultiplier * 8));
++    private static final int maxPoolSize = Integer.getInteger("Paper.maxNibblePoolSize", (int) Math.min(6, Math.max(1, Runtime.getRuntime().maxMemory() / 1024 / 1024 / 1024)) * (nibbleBucketSizeMultiplier * 8));
 +    public static final PooledObjects<byte[]> BYTE_2048 = new PooledObjects<>(() -> new byte[2048], maxPoolSize, 8);
 +    public static void releaseBytes(byte[] bytes) {
 +        if (bytes != null && bytes != EMPTY_NIBBLE && bytes.length == 2048) {