* numeric.c (num_step_scan_args): table argument of rb_get_kwargs() is
  array of IDs, not Symbols. [ruby-dev:48353] [Bug #9811]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46638 b2dd03c8-39d4-4d8f-98ff-823fe69b080e