If it is 1cm x 1 cm than almost certainly it could be repaired. Rapairing a small crack in the glass includes driling gently through the first layer of the glass to clean the cracked area and then applying warmed resin. The resin hardens and glues the cracked area. It is kind of similar to what the dentist does to a bad tooth during the filling
. The whole process takes 40 minutes and costs around 40-50 EUR (in Eastern Europe, at least). A small mark may remain on the windshield but it is significantly smaller and gentler than the crack (so makes sense if the crack is not directly in the driver's vision area). The improvement is big and most importantly the glass is glued so the crack will not get bigger with time.
To read more about it and see pictures I found something like here:
http://glasweld.com/windshield-repai...r-windshields/