DEBUG BUILD

An embedded-mysql application can crash in debug
mode with 'stack smashing detected' error when it
tries to connect without specifying the user name
(NULL).

The problem lies in the length of the buffer (array)
allocated to store user name in mysql_real_connect
function. This length did not take into consideration
an extra byte that strmake requires in order to store
either '\0' or 'Z' in debug mode (for padding empty
bytes).

Fixed by increasing the name buffer length by 1.