* srfi-14.c (scm_char_set_intersection, scm_char_set_xor): remove
the compulsory cs1 arguments: all args are optional in final spec.
+ (scm_char_set_xor): bug fix: characters should only be included if
+ they occur in exactly one argument, but were included if they
+ occured an odd number of times >= 3, e.g, in (char-set-xor a a a)
+ where a is (char-set #\a). fix it with a "mask" array.
+
* srfi-14.h: declarations updated.
2001-07-18 Martin Grabmueller <mgrabmue@cs.tu-berlin.de>