dir.c: warning for NUL
dir.c: warning for NUL

* dir.c (rb_push_glob): warn NUL-separated glob patterns.
  [Feature #14643]

git-svn-id: ab86ecd26fe50a6a239cacb71380e346f71cee7d@63190 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

eregon/rubyspec,nobu/rubyspec,ruby/spec,nobu/rubyspec,nobu/rubyspec,ruby/spec,ruby/rubyspec,ruby/spec,eregon/rubyspec,eregon/rubyspec,ruby/rubyspec