ext/dbm/extconf.rb: check dbm_pagfno() and dbm_dirfno().
ext/dbm/dbm.c: use above to set close-on-exec flag.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33652 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ext/dbm/extconf.rb: check dbm_pagfno() and dbm_dirfno().
ext/dbm/dbm.c: use above to set close-on-exec flag.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33652 b2dd03c8-39d4-4d8f-98ff-823fe69b080e