bugfix: broken single-digit bignum multiplication.

* mpi/mpi.c (s_mp_mul_d): The test used for deciding
whether or not the multiplication will carry, and possibly
needs another digit of space, is broken. There are situations
in which a carry occurs (k > 0) in spite of the test being
negative.  We code this the way it should have been done in
the first place: resize the object when carry actually occurs.
This still avoids calling s_mp_pad unless absolutely
necessary, as the removed comment says. Also, in the carry
case, we need not try to clamp away leading zeros.

0 files changed, 0 insertions, 0 deletions