Description of problem:
In perl-Sys-Virt doc, it said that
$dom->pm_wakeup()
Wakeup the guest from power management suspend state

$dom->pm_suspend_for_duration($target, $duration, $flags=0)
The $flags parameter is optional and defaults to zero.

But in real test, this 2 function can not be used without flags parameter and report error
Usage: Sys::Virt::Domain::pm_suspend_for_duration(dom, target, duration, flags) at perl-pmsus.pl line 12.
Usage: Sys::Virt::Domain::pm_wakeup(dom, flags) at perl-pmsus.pl line 15

Version-Release number of selected component (if applicable):
perl-Sys-Virt-0.10.2-3.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Prepare a guest named rhel6u3 with qemu-guest-agent running in guest and with xml
...
  <os>
    <type arch='x86_64' machine='rhel6.4.0'>hvm</type>
    <loader>/usr/share/seabios/bios-pm.bin</loader>
    <boot dev='hd'/>
  </os>
...
    <channel type='unix'>
      <source mode='bind' path='/var/lib/libvirt/qemu/rhel6u3.agent'/>
      <target type='virtio' name='org.qemu.guest_agent.0'/>
      <alias name='channel0'/>
      <address type='virtio-serial' controller='0' bus='0' port='1'/>
    </channel>
...

2. Run script # perl perl-pmsus.pl
#!/usr/bin/perl
use warnings;
use strict;
use Sys::Virt;

my $uri = "qemu:///system";
my $domname = "rhel6u3";
my $con = Sys::Virt->new(address => $uri, readonly => 0);
my $dom = $con->get_domain_by_name($domname);
$dom->pm_suspend_for_duration(Sys::Virt::NODE_SUSPEND_TARGET_MEM, 0);
$dom->pm_wakeup();

3. Change above
$dom->pm_suspend_for_duration(Sys::Virt::NODE_SUSPEND_TARGET_MEM, 0);
to
$dom->pm_suspend_for_duration(Sys::Virt::NODE_SUSPEND_TARGET_MEM, 0, 0);
and run again
  
Actual results:
failed with error
2. Usage: Sys::Virt:omain:m_suspend_for_duration(dom, target, duration, flags) at perl-pmsus.pl line 12.
3. Usage: Sys::Virt:omain:m_wakeup(dom, flags) at perl-pmsus.pl line 15

Expected results:
All succeed

Additional info: