[libvirt] [PATCH] logrotate: don't rotate zero-length logfiles only

Hi. In logrotate configuration files used by libvirt, there is an option 'minsize 100k', which prevents logrotate from rotating small (< 100k) files into an archive. But the target goal of the http://www.mail-archive.com/libvir-list@redhat.com/msg17443.html patch was to prevent logrotate from packing _empty_ files. This indeed could be done more accurately with the 'notifempty' option, see attached patch.