Ruby

array.c: reduce to_ary call

• array.c (flatten): no need to call to_ary method on elements
  beyond the given level. [ruby-core:67637] [Bug #10748]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49400 b2dd03c8-39d4-4d8f-98ff-823fe69b080e