Description of problem:
when first add hooks daemon script on /etc/libvirt/hooks/ and then shutdown the libvirtd service, hooks daemon script can not be executed.
# cat /etc/libvirt/hooks/daemon 
#! /bin/bash
echo "$0" "$@" \
>> /tmp/daemon.log
exit 0
 
After shutdown, no message like "/etc/libvirt/hooks/daemon - shutdown - shutdown" exists on /tmp/daemon.log

I find it comes from the function virHookCall()
...
    if ((virHooksFound == -1) ||
        ((driver == VIR_HOOK_DRIVER_DAEMON) &&
         (op == VIR_HOOK_DAEMON_OP_RELOAD)))
        virHookInitialize();
...

when libvirtd started, the virHookInitialize() has already changed the virHooksFound to 0, so here it should be 
...
if ((virHooksFound == 0) ||
        ((driver == VIR_HOOK_DRIVER_DAEMON) &&
         (op == VIR_HOOK_DAEMON_OP_RELOAD)))
        virHookInitialize();
...
Version-Release number of selected component (if applicable):
libvirt-0.8.7-6.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1.start libvirtd service with no daemon script writting
2.writting /etc/libvirt/hooks/daemon with
#! /bin/bash
echo "$0" "$@" \
>> /tmp/daemon.log
exit 0

3.run #service libvirtd stop
  
Actual results:
no log in /tmp/daemon.log 

Expected results:
has log in /tmp/daemon.log
/etc/libvirt/hooks/daemon - shutdown - shutdown

Additional info: