Fix the rectangle-edges* bug that prevented beirc from properly starting up on os x.
Fix the rectangle-edges* bug that prevented beirc from properly starting up on os x.

 * map-over-updating-output shouldn't call itself with a nil record;
   it breaks expectations of code in the same file.

quek/mcclim,informatimago/mcclim,informatimago/mcclim,quek/mcclim