Update MySQLPlugin.cpp
Update MySQLPlugin.cpp

In some query like the one below, the columns may return NULL values which will cause segmentaion issue shutdowns. So as the discussion in issue 7, I suggest to push an empty string or undefined.

Ex query:

SELECT MAX(player_score) AS max_score, COUNT(player_id) AS player_cnt
FROM table
WHERE condition 

If there is no record in the table, the column max_score will be NULL and player_cnt will be zero. This will probably cause segmentaion issues. So pushing undefined or empty string if some column has NULL value can fix the segmentation error.
callofduty4x/mysql,callofduty4x/mysql