[libvirt] [PATCH] fix Xen event handling

As was reported on IRC and found by Dan Berrange, sometimes Xen event handling could start to go wild and block processing of requests in the daemon. The fault at least on libvirt side is that we didn't filter out non read/write event requests when asking for watches in the xenstore. The provided patch seems to work for the person who reported the original problem, Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel@veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/