use 0 for rb_data_type_t::reserved instead of NULL, since its type
may be changed in the future and possibly not a pointer type.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48662 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
since hash use st_foreach_check for iterations, such checks are
needless.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35193 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
and st_delete_safe. patched by Sokolov Yura at
https://github.com/ruby/ruby/pull/84
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34963 b2dd03c8-39d4-4d8f-98ff-823fe69b080e