[tpcc-mysql] payment.c c_new_data not used

[Andy Grove]

in payment.c, a field c_new_data is populated and the value is never used.

The comment indicates that c_new_data should be written to the customer table:

  /*EXEC_SQL UPDATE customer
   SET c_balance = :c_balance, c_data = :c_new_data
   WHERE c_w_id = :c_w_id
   AND c_d_id = :c_d_id
   AND c_id = :c_id;*/

However, the code writes c_data instead of c_new_data:

  memset(param, 0, sizeof(MYSQL_BIND) * 5); /* initialize */
  param[0].buffer_type = MYSQL_TYPE_FLOAT;
  param[0].buffer = &c_balance;
  param[1].buffer_type = MYSQL_TYPE_STRING;
  param[1].buffer = c_data;
  param[1].buffer_length = strlen(c_data);

It should be:

  param[1].buffer = c_new_data;
  param[1].buffer_length = strlen(c_new_data);