libvirtd does not clean up pid file

Hi,

I found out that libvirtd will incorretly create a pid file even when it does not start up properly.

Error
====
libvirtd start
20:04:43.882: error : qemudWritePidFile:494 : Failed to open pid file '/var/run/libvirtd.pid' : File exists

Expected resolution
================
libvirtd should not create the pid file before it starts up successfully.

Package version: 0.7.5-5ubuntu2
uname -a: Linux ip-xx-xx-xx-xx 2.6.32-305-ec2 #9-Ubuntu SMP Thu Apr 15 04:14:01 UTC 2010 i686 GNU/Linux

Related to https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/510658 , but the difference is that when libvirtd fails to start up cleanly, it should not have created the pid in the first place.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: libvirt-bin 0.7.5-5ubuntu27.2
ProcVersionSignature: Ubuntu 2.6.32-305.9-ec2 2.6.32.11+drm33.2
Uname: Linux 2.6.32-305-ec2 i686
Architecture: i386
Date: Wed Aug 18 20:07:32 2010
Ec2AMI: ami-2dea957f
Ec2AMIManifest: bitnami-cloud-ap/knowledgetree/bitnami-knowledgetree-3.7.0.2-1-linux-ubuntu-10.04.manifest.xml
Ec2AvailabilityZone: ap-southeast-1a
Ec2InstanceType: m1.small
Ec2Kernel: aki-bdf38cef
Ec2Ramdisk: unavailable
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: libvirt