Description of problem:
In virt-p2v client, the network device select page sometimes skip to display, even the host have two network devices.
This is incorrect behaviour, as different network devices maybe connected with different network, user should have the privilege to choose which one to use.
This issue was not always reproduced.

BTW, if the host has only network device, launch the virt-p2v pxe iso, sometimes network device select page skip to display either.

Version-Release number of selected component (if applicable):
virt-p2v-0.8.6-5.20120502.1.el6.iso
virt-v2v-0.8.7-6.el6.x86_64
libguestfs-1.16.19-1.el6.x86_64
libvirt-0.9.10-20.el6.x86_64
augeas-0.9.0-4.el6.x86_64
febootstrap-3.12-1.el6.x86_64
hivex-1.3.3-4.el6.x86_64
libguestfs-winsupport-1.0-7.el6.x86_64
virtio-win-1.5.1-1.el6.noarch

How reproducible:
40%

Steps to Reproduce:
1. Use a host with two network device and launch the virt-p2v iso by PXE boot method.
2. Check the first pop up page
3. Use the same machine try to execute step1 and step2 some times

Actual Results:
The network device select page sometimes skip to display.

Expected results:
The network device select page should always display

Additional info:
The behaviour for virt-p2v page display should be consistent, as even one network device of host, sometimes display the network deivce page, sometimes not.