When confronted with an empty line, getmntent() can underrun
a buffer, possibly doing very strange things if it finds
additional space/tab characters. Backport the upstream fix.
(From OE-Core rev: 983a19a65a31b54a6f505181012bd311c28a0ae1)
Signed-off-by: Peter Seebach <peter.seebach@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>