GUID generator (sort of) for cracked server?

[ebusiangamers]

Hello,

I'm running a cracked server on CoDUO: the result is player GUIDs are all 0.
GUIDs serve a bunch in MySQL: easier to search due to its unicity.

So I decide to make this function.

		mysql_get_guid(length)
{
    /*
    Notes from ebusiangamers: 
    - It is a number that indentify players. Each GUID generated must be unique.
    - However, the player will have (50%)? chance that his GUID matches with another. 
    - You can change the amount of digits to your liking.
    */
    if(!isDefined(length))
        length = 7;
    
    guid = 0; a = length - 1;
    for(i = 0; i < length; i++)
    {
        digit[i] = randomInt(9);
        while(digit[i] == 0)
            digit[i] = randomInt(9);
        guid += digit[i]*exp(10, a);
        a--;
    }

    self.guid = guid;
    return guid;
} 
	

Tell me what you think.