[CRITICAL BUG, UB] Signed left-shift overflow in `sha1_transform`

[PavelSharp]

As noted in #33 we have the same problem when building m[i]:

crypto-algorithms/sha1.c

Line 26 in cfbde48

m[i] = (data[j] << 24) + (data[j + 1] << 16) + (data[j + 2] << 8) + (data[j + 3]);

So, an integer promotion is happening here, and subexpression data[j] << 24 may set the sign bit of a 32-bit (probably 32-bit) signed int.
Possible fixes:

1. m[i] = ((WORD)data[j] << 24) + (data[j + 1] << 16) + (data[j + 2] << 8) + (data[j + 3]); similarly to Signed overflow undefined behavior in md5.c #33
2. m[i] = ((WORD)data[j] << 24) | ((WORD)data[j + 1] << 16) | ((WORD)data[j + 2] << 8) | ((WORD)data[j + 3]);