Segfault with clang + blake2bp/blake2sp about blake2

[sneves]

Clang sees the aligned(64) hint in blake2.h and thinks "hey, I can emit aligned loads for every structure of this kind". This usually works, because the compiler will also have control of the allocation of the structures.

However, in the blake2*p case we define an array of structures whose sizeof is not a multiple of 64. This forces the 2nd, 3rd, etc structures to be misaligned and is what causes the crash. The solution is simple: remove the alignment hint from blake2.h. This is as simple as commenting __attribute__ ((__aligned__(x))) in line 23. I used to rely on the alignment of structures in early versions of the code, but that is no longer the case, so doing this is perfectly safe.

[ivan]

Thanks! That does fix the crash. (Tested clang-3.6)

[sneves]

Also fixed in this repo now.