COMMITTED: UCS crash fix

[Zothen]

Okay, I think it makes sense to post my fix here, since my UCS isnt crashing anymore.

I think I found the bug in UCS that is causing a crash.

Debugging showed up a halt in DBCore::Open() after a call of mysql_real_connect() using an uninitialized mysql struct.

The struct gets uninitialized whenever theres a connection error of some sort, because mysql.close() makes it invalid. Without another call to mysql.init() all following sql connects/commands will fail, resulting in a crash.

So we just need to enter a single line of code... :

(May need some more testing, but mine is running stable now for 20 hours.)

bool DBcore::Open(int32* errnum, char* errbuf) {
	if (errbuf)
		errbuf[0] = 0;
	LockMutex lock(&MDatabase);
	if (GetStatus() == Connected)
		return true;
	if (GetStatus() == Error)
	{
		mysql_close(&mysql);          // <- Makes struct 'mysql' invalid!
		mysql_init(&mysql);        //   <- Initialize structure again
	}
	if (!pHost)
		return false;
	/*
	Quagmire - added CLIENT_FOUND_ROWS flag to the connect
	otherwise DB update calls would say 0 rows affected when the value already equalled
	what the function was tring to set it to, therefore the function would think it failed 
	*/
	int32 flags = CLIENT_FOUND_ROWS;
	if (pCompress)
		flags |= CLIENT_COMPRESS;
	if (pSSL)
		flags |= CLIENT_SSL;
	// crashed here, because 'mysql' wasnt valid after an error followed by mysql.close() 
	if (mysql_real_connect(&mysql, pHost, pUser, pPassword, pDatabase, pPort, 0, flags)) { 
		pStatus = Connected;
		return true;
	}
	else {
		if (errnum)
			*errnum = mysql_errno(&mysql);
		if (errbuf)
			snprintf(errbuf, MYSQL_ERRMSG_SIZE, "#%i: %s", mysql_errno(&mysql), mysql_error(&mysql));
		pStatus = Error;
		return false;
	}
}