Name: change_spell( name, value, max_value, relTime)

Location: living.c

Funktion:
Change the "value" of the spell

Arguments:
name	-- the name of the spell
value	-- the new value of the spell
max_v	-- the max-value (only used if the spell is new)
relTime	-- release-time in heartbeats


Return:
-1	-- No change
 0 	-- Spell is NEW or max_value/relTime have been changed
value	-- Change was successful



