Use pointer arithmetic over array index syntax

Author: RaoulSchaffranek

runtime/strings/bytes.cpp

@@ -167,8 +167,8 @@ string *bytes2hexstring(string *b, size_t len) {
   auto *result
       = static_cast<string *>(kore_alloc_token(sizeof(string) + len * 2));
   for (size_t i = 0; i < len; i++) {
-    result->data[i * 2] = hexchars[(b->data[i] >> 4) & 0xf];
-    result->data[i * 2 + 1] = hexchars[b->data[i] & 0xf];
+    result->data[i * 2] = hexchars[(*(b->data + i) >> 4) & 0xf];
+    result->data[i * 2 + 1] = hexchars[(*(b->data + i)) & 0xf];
   }
   init_with_len(result, len * 2);
   return result;