scd: Fix the use case of verify_chv2 by CHECKPIN.
* scd/app-openpgp.c (verify_chv2): Call verify_a_chv with chvno=1 when needed.
Backport of master commit of:
6e51f2044aebb885ea81dae259db1b7f477b1c44
- Fixes-commit: d2f1a0a791db3eb03c003365cbcd010bd8066edb
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>