Function: dbg_down
Class: gp
Section: programming/control
C-Name: dbg_down
Prototype: vD1,L,
Help: dbg_down({n=1}): (break loop) go down n frames. Cancel a previous dbg_up.
Doc: (In the break loop) go down n frames. This allows to cancel a previous call to
 \kbd{dbg\_up}.
