Reading Bytes in Minecraft code has a possible flaw

    public static byte[] readBytesFromStream(DataInputStream par0DataInputStream) throws IOException
    {
        short var1 = par0DataInputStream.readShort();

        if (var1 < 0)
        {
            throw new IOException("Key was smaller than nothing!  Weird key!");
        }
        else
        {
            byte[] var2 = new byte[var1];
            par0DataInputStream.read(var2);
            return var2;
        }
    }