util/cbfstool: free buffer on error path

Fix memory leak found by scan-build from clang version 3.2-11.

Change-Id: Id8f9db46cf42012a0eb0a632c9d83a4eec1989a2
Signed-off-by: Daniele Forsi <dforsi@gmail.com>
Reviewed-on: http://review.coreboot.org/6379
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
1 file changed