event: Make debug message match function comments
event: Make debug message match function comments

The debug message said there was a timeout of 0 pending for -1 ms which
made me think this is where a hang was coming from but according to the
function comments this case means that there is no timeout pending so
make the debug message say that instead of saying there's a -1 ms
timeout.

nertpinx/libvirt,cbosdo/libvirt,nertpinx/libvirt,elmarco/libvirt,taget/libvirt,agx/libvirt,datto/libvirt,zhlcindy/libvirt-1.1.4-maintain,agx/libvirt,libvirt/libvirt,zhlcindy/libvirt-1.1.4-maintain,fabianfreyer/libvirt,jardasgit/libvirt,libvirt/libvirt,eskultety/libvirt,shugaoye/libvirt,cbosdo/libvirt,datto/libvirt,rlaager/libvirt,shugaoye/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,datto/libvirt,olafhering/libvirt,eskultety/libvirt,taget/libvirt,jfehlig/libvirt,rlaager/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,eskultety/libvirt,jardasgit/libvirt,eskultety/libvirt,elmarco/libvirt,rlaager/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,elmarco/libvirt,jfehlig/libvirt,zippy2/libvirt,rlaager/libvirt,andreabolognani/libvirt,crobinso/libvirt,andreabolognani/libvirt,crobinso/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,agx/libvirt,zippy2/libvirt,andreabolognani/libvirt,crobinso/libvirt,taget/libvirt,taget/libvirt,VenkatDatta/libvirt,olafhering/libvirt,crobinso/libvirt,libvirt/libvirt,agx/libvirt,datto/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,cbosdo/libvirt,jfehlig/libvirt,eskultety/libvirt,agx/libvirt,elmarco/libvirt,shugaoye/libvirt,andreabolognani/libvirt,jardasgit/libvirt,datto/libvirt,nertpinx/libvirt,cbosdo/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,taget/libvirt,zippy2/libvirt,olafhering/libvirt,jfehlig/libvirt,elmarco/libvirt,olafhering/libvirt,fabianfreyer/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,libvirt/libvirt,cbosdo/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,rlaager/libvirt