bigdecimal.c: expand buffer
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44558 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
bigdecimal.c: expand buffer
64bit platforms.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44558 b2dd03c8-39d4-4d8f-98ff-823fe69b080e