The difference between 4.5in (114.3mm) and 115mm (4.527559...in) is yet another lovely bi-product of our SAE measuring system. Though small, it is not an insignificant difference. Mismatching the hub and wheel bolt pattern has the effect of pulling the studs at a slight angle, which makes them more susceptible to breaking and introduces the possibility of a slightly misaligned wheel. Definitely not worth the risk IMO.
That said, lots of people do it and not ALL of them have problems...