debug: trivial fixes

* ext/-test-/debug/init.c (Init_debug): use normal module.

* ext/-test-/debug/inspector.c (callback): debug_inspector interfaces
  now use long.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38973 b2dd03c8-39d4-4d8f-98ff-823fe69b080e