* bignum.c (bary_mul): Arguments for work memory added.
  (bary_mul_balance): Ditto.
  (bary_mul_karatsuba): Ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41833 b2dd03c8-39d4-4d8f-98ff-823fe69b080e