merge revision(s) 43775: [Fixes GH-458]
https://github.com/ruby/ruby/pull/458

   * util.c (ruby_strtod): ignore too long fraction part, which does not
     affect the result.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@44353 b2dd03c8-39d4-4d8f-98ff-823fe69b080e