Name: add_alignment - change the alignment of a living

Syntax:
	add_alignment(int al)

Description:
	The add_alignment call updates the alignment of a living. It is
	normally used in combat if one of the enemies of the living dies.

	The al argument may have a positive or a negative value. The current
	alignment is multiplied by 9/10 and al is added to it.

	If the living is a player and no wizard, the alignment title will be
	changed.

Return value: none

Examples:
	this_player()->add_alignment(20);

See also: living/query_alignment, living/set_al