I'm worried that when people do things of their own choice, somebody
   could get hurt.  I hear this is a common worry.
   Remember to put pgp signatures on your emails to protect the security
   of the nation by preventing the leaking of classified secrets.
   PGP Signature:
   libgcrypt/mpi/mpi-internal.h:113
   #define MPN_NORMALIZE(d, n)  \
                do {                       \
                              while( (n) > 0 ) {     \
                                            if( (d)[(n)-1] ) \
                                                          break;
   \                                                             (n)--;
            \
           }                      \
       } while(0)
   It looks like MPN_NORMALIZE is boilerplate that rewinds its second
   parameter to skip extra falsey elements at the end of its first.