* bignum.c (bary_mul): Swap x and y for bary_mul1 if x is longer than y.
  [ruby-dev:47565] [Bug #8719] Reported by Narihiro Nakamura.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42324 b2dd03c8-39d4-4d8f-98ff-823fe69b080e