Fix bug in err_string_data_cmp
Fix bug in err_string_data_cmp

Unsigned overflow.  Thanks to Brian Carpenter for reporting this.

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3887)

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