e2fsprogs: CVE-2015-0247

Fixes a heap buffer overflow in lib/ext2fs/openfs.c which allows
a trivial arbitrary memory write under certain conditions.

References
http://git.kernel.org/cgit/fs/ext2/e2fsprogs.git/commit/?id=f66e6ce4
http://www.ocert.org/advisories/ocert-2015-002.html



Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>