I got it to work, but it was a little more work. If anyone is interested, here are the details.
In includes/cyberbal.h, modify the above line to read:
#define CYBERBALL_DUAL_MODE 0
Unfortunately, this uncovers an error in compilation. In vidhrdw/cyberball.c, you will need to change line 453 as follows:
update_one_screen(current_screen, bitmap, (struct rectangle *)cliprect);