The Baja PRINT function (used in yesnobar.src/noyesbar.src) calls putmsg()
with P_SAVEATR|P_NOABORT. Without P_NOABORT, putmsg() doesn't display anything
if the global console abort (SS_ABORT) flag is set.

So hitting 'N' or Ctrl-C at one yes/no or no/yes prompt would mean any
immediately subsequent yes/no or no/yes prompt would not be displayed.

Now that we have to require('sbbsdefs.js') for the P_NOABORT definition,
this'll run a little slower. :-(

Enable/conform to "use strict" mode.