[PATCH 17/21] bloblist: Zero records when adding

[sjg at google.com]

It is convenient for bloblist to zero out the contents of a records when
it is added. This saves the callers having to do it.

Update the API accordingly.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 common/bloblist.c   |  3 +++
 doc/README.bloblist |  4 ++--
 test/bloblist.c     | 27 +++++++++++++++++++++++++--
 3 files changed, 30 insertions(+), 4 deletions(-)

Applied to u-boot-dm, thanks!