Argon2 incorrect result and division by zero

[NIIBE Yutaka]

Hello,

Thanks a lot for your test case.  It's my mistake in the implementation.

Guido Vranken wrote:
> It seems that the 64 bytes are always correct but with output sizes larger
> than that, discrepancies occur.
>
> Additionally there is a division by zero on this line in argon2_init() if
> parallelism is set to 0:
>
>   segment_length = memory_blocks / (parallelism * 4);
>
> it would be better to return an error in this case.

Two problems are fixed in master by the commit:

	564739a58426d89db2f0c9334659949e503d2c59

And 1.10 branch by:

	13b5454d2620701863f6e89221f5f4c98d2aba8e
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