qga-win: fix leaks of build_guest_disk_info()

Introduced in commit b1ba8890e63ce9432c41c5c3fc229f54c87c9c99, vol_h
handle should be closed, and "out" cleanup should be done after
DeviceIoControl() fails.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
1 file changed