Name: query_sp - return the amount of spell points of a living

Syntax:
	int query_sp()

Description:
	The query_sp call returns the amount of spell points of a living.

Return value:
	A positive integer indicating the spell points. The value is always
	lower or equal to the max_sp.

Examples:
	int sp;
	sp=this_player()->query_sp();

See also: living/query_max_sp, living/query_hp