g10: Signal an error when trying to revoke non-existant UID.
* g10/keyedit.c (keyedit_quick_revuid): Signal an error when trying to revoke non-existant UID. * tests/openpgp/quick-key-manipulation.scm: Test that.
- GnuPG-bug-id: T2962
- Signed-off-by: Justus Winter <justus@g10code.com>