Landing on the ground sound effects

Add to bottom of .cns file after [Statedef -2] entry. If there
is no [Statedef -2] entry then just make one by adding just
[Statedef -2] as a new line and nothing more. The value = 3,9
change to the sound number used in the character's .snd file
for the landing on the ground sound. 

[State -2, 2]
type = PlaySnd
trigger1 = time = 1
trigger1 = stateno = 52
value = 3,9