randfile.c: fix a Coverity warning
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7510)
Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7510)
mentioned in commit c7a7ed38
·mentioned in commit c7a7ed38