Merge remote-tracking branch 'stefanha/net' into staging

# By Jason Wang (1) and Stefan Hajnoczi (1)
# Via Stefan Hajnoczi
* stefanha/net:
  tap: fix NULL dereference when passing invalid parameters to tap
  vmxnet3: fix NICState cleanup

Message-id: 1370613288-14933-1-git-send-email-stefanha@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>