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sha1 alignment bug

In sha1.h, there are a few member variables defined as:

unsigned char Buffer[64];
unsigned char State[5*4];
unsigned char Count[2*4];

the code goes on to address these as uint32_t * 's... on 64-bit
architectures this causes very bad unaligned accesses.

i've fixed this in cvs by adding appropriate attribute settings to these
buffers. i wonder if there are other ones like these in the code?

Debian Developer <tausq@debian.org>

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