message: fix php5 redis hMSet bug
diff: @@ -1464,10 +1464,8 @@ static PHP_METHOD(swoole_redis_coro, hMSet)
  SW_REDIS_COMMAND_ARGV_FILL("HMSET", 5)
  SW_REDIS_COMMAND_ARGV_FILL(key, key_len)
  #if (PHP_MAJOR_VERSION < 7)
  - char *field;
  - uint32_t field_len;
  int keytype;
  - SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(z_arr), field, field_len, keytype, value)
  + SW_HASHTABLE_FOREACH_START2(Z_ARRVAL_P(z_arr), key, key_len, keytype, value)
  {
  if (HASH_KEY_IS_STRING != keytype)
  {
  