Add a workaround for gpgme bug that results in can_sign not being set for OpenPGP key objects obtained from a secret-key listing.
Add a workaround for gpgme bug that results in can_sign not being set for OpenPGP key objects obtained from a secret-key listing.

svn path=/trunk/kdepim/libkdenetwork/gpgmepp/; revision=300556

KDE/gpgmepp,KDE/gpgmepp,KDE/gpgmepp