NAME
	called_file - return the calling sourcefile

SYNOPSIS
	varargs string calling_file(int n)


DESCRIPTION
	Return the sourcefile calling at callchain n. It will be the last
	file in its inheritance chain. The first argument defaults to 0.

SEE ALSO
	kfun/previous_program, efun/called_locally, efun/calling_object,
	efun/previous_function
