file.c: rb_check_realpath
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59983 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
file.c: rb_check_realpath
symbolic links. similar to rb_realpath except for returning
Qnil if any parts did not exist.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59983 b2dd03c8-39d4-4d8f-98ff-823fe69b080e