remove naive attempt to pre-create very large read buffers, preventing crashes under linux and windows
remove naive attempt to pre-create very large read buffers, preventing crashes under linux and windows

tenderlove/yajl-ruby,mrkn/yajl-ruby,sferik/yajl-ruby,sferik/yajl-ruby,tenderlove/yajl-ruby,sferik/yajl-ruby,brianmario/yajl-ruby,brianmario/yajl-ruby,brianmario/yajl-ruby