openpgp: Add missing type predicate for '&openpgp-invalid-signature-error'.

Reported by brendyyn on #guix.  The mistake led to a macro expansion
error on Guile 2.2 but not on 3.0.2.

* guix/openpgp.scm (&openpgp-invalid-signature-error): Add missing type
predicate.
This commit is contained in:
Ludovic Courtès 2020-05-04 10:51:39 +02:00
parent 1f14e25c19
commit 06735a57a9
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@ -136,6 +136,7 @@ (define-condition-type &openpgp-unrecognized-packet-error &openpgp-error
;; Error raised when reading an invalid signature packet.
(define-condition-type &openpgp-invalid-signature-error &openpgp-error
openpgp-invalid-signature-error?
(port openpgp-invalid-signature-error-port))