allow-other-keys typo in optargs.scm

[Bill Schottstaedt]

I think the line (209 in optargs.scm)

  ((allow-other-keys) #:allow-other-keys-value)

should be

  ((allow-other-keys) #:allow-other-keys)


Also, as I'm sure you guys know already (I'm not on this
mailing list), (use-modules (ice-9 syncase)) dies in the
current guile with a segfault.