Replace an instance of string-ish [[ $? -gt 0 ]] with arithmetic (( $? != 0 )).

This more accurately reflects that "non-zero exit status indicates
failure"; while > 0 will no doubt work as well, != 0 avoids the question
of whether $? is signed or unsigned in bash and more accurately
represents the documentation ("non-zero", != 0).

cipherscan

@@ -633,7 +633,7 @@ bench_cipher() {
     for i in $(seq 1 $BENCHMARKITER); do
         debug Connection $i
         (echo "Q" | $sslcommand 2>/dev/null 1>/dev/null)
-        if [[ $? -gt 0 ]]; then
+        if (( $? != 0 )); then
             break
         fi
     done