Definition : F_EXP_ON_KILL(ka, va)

Defined in : #include <formulas.h>

Description: Determines the amount of experience that is awarded when you
             kill a living. This amount is based on the average stat of both
             the killer and the victim.

Arguments  : int ka - the average stat of the killer.
             int va - the average stat of the victim.

Returns    : (int) the experience to be awarded.
