array.c: fill with nil
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36393 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
array.c: fill with nil
[ruby-core:43678] [Bug #6203]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36393 b2dd03c8-39d4-4d8f-98ff-823fe69b080e