Are you getting “Too few parameters” error for droptofloor() function?
Be sure to modify line 602 in defs.qc,
float(float yaw, float dist) droptofloor= #34; // TRUE if landed on floor
with this one
float() droptofloor= #34; // TRUE if landed on floor
Function droptofloor() is a float and should return TRUE or FALSE. Drops self to the floor, if the floor is less than -256 coordinates below. Returns TRUE if landed on floor. Mainly used to spawn items or walking monsters on the floor.