Work around gpgme_op_keylist_ext_start ignoring GPGME_KEYLIST_MODE_EXTERN by calling the single-pattern version if only one pattern is actually given.
Work around gpgme_op_keylist_ext_start ignoring GPGME_KEYLIST_MODE_EXTERN by calling the single-pattern version if only one pattern is actually given.

svn path=/trunk/KDE/kdepimlibs/; revision=800259

KDE/gpgmepp,KDE/gpgmepp,KDE/gpgmepp