Optimize circular buffer to avoid modulo

CLA: trivial

Avoid doing the division via modulo where possible.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #23097)

crypto/bio/bio_dump.c

@@ -141,9 +141,10 @@ int BIO_hex_string(BIO *out, int indent, int width, const void *data,
 
         BIO_printf(out, "%02X:", d[i]);
 
-        j = (j + 1) % width;
-        if (!j)
+        if (++j >= width) {
+            j = 0;
             BIO_printf(out, "\n");
+        }
     }
 
     if (i && !j)