Merge remote-tracking branch 'mdroth/qga-pull-1-14-2013' into staging

Merge remote-tracking branch 'mdroth/qga-pull-1-14-2013' into staging

* mdroth/qga-pull-1-14-2013:
  qemu-ga: Handle errors uniformely in ga_channel_open()
  qemu-ga: Plug fd leak on ga_channel_open() error paths
  qemu-ga: Plug fd leak on ga_channel_listen_accept() error path
  qemu-ga: Plug file descriptor leak on ga_open_pidfile() error path
  qemu-ga: Drop pointless lseek() from ga_open_pidfile()
  qemu-ga: Document intentional fall through in channel_event_cb()
  qemu-ga: add ga_open_logfile()
  qemu-ga: ga_open_pidfile(): use qemu_open()

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>