checkout - bug fix
checkout - bug fix

Improvement to error handler. Was causing an exception if datapointer
wasn't in _rtag.

campuscolors/campuscolors,CommerceRack/anycommerce,sportsworldchicago/app.sportsworldchicago.com---AnyCommerce-Development,campuscolors/campuscolors,speedaddictcycles/speedaddictcycles,campuscolors/campuscolors,CommerceRack/anycommerce,speedaddictcycles/speedaddictcycles,speedaddictcycles/speedaddictcycles,CommerceRack/anycommerce,sportsworldchicago/app.sportsworldchicago.com---AnyCommerce-Development