fixes #222
fixes #222

if there is a helper, use it in the case that the attribute name
doesn't exist on the observe

jebaird/canjs,rjgotten/canjs,tracer99/canjs,patrick-steele-idem/canjs,rjgotten/canjs,patrick-steele-idem/canjs,beno/canjs,sporto/canjs,whitecolor/canjs,thomblake/canjs,rjgotten/canjs,whitecolor/canjs,bitovi/canjs,patrick-steele-idem/canjs,schmod/canjs,jebaird/canjs,yusufsafak/canjs,janza/canjs,jebaird/canjs,rasjani/canjs,dispatchrabbi/canjs,bitovi/canjs,UXsree/canjs,bitovi/canjs,airhadoken/canjs,schmod/canjs,tracer99/canjs,thecountofzero/canjs,dispatchrabbi/canjs,cohuman/canjs,gsmeets/canjs,thecountofzero/canjs,airhadoken/canjs,shiftplanning/canjs,gsmeets/canjs,shiftplanning/canjs,whitecolor/canjs,rasjani/canjs,asavoy/canjs,Psykoral/canjs,asavoy/canjs,rjgotten/canjs,juristr/canjs,thomblake/canjs,azazel75/canjs,juristr/canjs,ackl/canjs,azazel75/canjs,Psykoral/canjs,tracer99/canjs,sporto/canjs,ackl/canjs,Psykoral/canjs,sporto/canjs,bitovi/canjs,rasjani/canjs,UXsree/canjs,cohuman/canjs,Psykoral/canjs,cohuman/canjs,ackl/canjs,janza/canjs,schmod/canjs,scorphus/canjs,scorphus/canjs,gsmeets/canjs,beno/canjs,yusufsafak/canjs,beno/canjs,rasjani/canjs