Patch merged into coreboot/master: intelvbttool: cope with errors in open()

the following patch was just integrated into master:
commit 1fcebe7fd952d8ea50d421bbc0bd02f23cbf760b
Author: Patrick Georgi 
Date:   Fri Jul 29 18:28:42 2016 +0200

intelvbttool: cope with errors in open()

Change-Id: I9fee87b7331ee05d4e984cb024f124abb2c97a69
    Signed-off-by: Patrick Georgi 
    Found-by: Coverity Scan #1347357
    Reviewed-on: https://review.coreboot.org/15962
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Duncan Laurie

See https://review.coreboot.org/15962 for details.

-gerrit