suggested change for cipher/sha1.c's M(i) macro

[Werner Koch]

On Sun, 17 Sep 2000, Jim Meyering wrote:

> Please consider using `rol( tm, 1 )' in place of the functionally
> equivalent `(tm << 1) | (tm >> 31)'.

Okay, I can do so.  However, at least gcc 2.95.2 does optimize this
construct to rol() anyway.  I benchmarked both versions and there is
no difference.

  Werner

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Werner Koch				GnuPG key:  621CC013
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