Fix Coverity 1498612 & 1503221: integer overflow
Fix Coverity 1498612 & 1503221: integer overflow

Both are the same issue and both as false positives.  Annotate the line so
that this is ignored.

Reviewed-by: Tomas Mraz <2bc6038c3dfca09b2da23c8b6da8ba884dc2dcc2@openssl.org>
Reviewed-by: Bernd Edlinger <ac6902843ae77cc0d49b9c8ddec4cbf141db1bb7@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/18012)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl