NAME
	call_touch - prepare to report when the object is next touched

SYNOPSIS
	void call_touch(object obj)


DESCRIPTION
	Just before the next call to the object, call the function "touch" in
	the driver object, with the object and the function to be called as
	arguments.

ERRORS
	An error will result if the object did not yet have its creator
	function called.

SEE ALSO
	kfun/call_other