[or-cvs] make changes that ben laurie suggested

[Ben Laurie]

Roger Dingledine wrote:

> Update of /home/or/cvsroot/src/common
> In directory moria.mit.edu:/home2/arma/work/onion/cvs/src/common
> 
> Modified Files:
> 	crypto.c 
> Log Message:
> make changes that ben laurie suggested
> (ben, was this what you had in mind?)

Yep - casts are evil!

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