* ext/bigdecimal/lib/bigdecimal/util.rb (Float#to_d): fix the number
  of figures.  Patch by Vipul A M <vipulnsward@gmail.com>.
  https://github.com/ruby/ruby/pull/323  fix GH-323

* test/bigdecimal/test_bigdecimal_util.rb: fix for the above change.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41058 b2dd03c8-39d4-4d8f-98ff-823fe69b080e