trivial: fix -Werror=format
trivial: fix -Werror=format

Signed-off-by: Igor Gnatenko <71fb2d16c26f553767b965fdac40e83622cad277@redhat.com>

rpm-software-management/librepo,Tojaj/librepo,Tojaj/librepo,rpm-software-management/librepo,Tojaj/librepo,rpm-software-management/librepo