Fix AIOOBE

By: md_5 <md_5@live.com.au>

CraftBukkit-Patches/0021-Add-oreobfuscator-for-Spigot.patch

@@ -209,7 +209,7 @@ index 0000000..1ac8c26
 +                                        buffer[index] = (byte) Block.STONE.id;
 +                                    }
 +                                }
-+                                if (++index > buffer.length) {
++                                if (++index >= buffer.length) {
 +                                    return;
 +                                }
 +                            }