[Libguestfs] [PATCH 1/4 version 2] Implement progress messages in the daemon and library.

There was a small bug in patch 1/4: it would always send a notification message at 100%, even for "short" (< 1 second) calls. This fixes the bug. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/