Wow. That was close.
I'm not convinced the shirt touched the 9. I didn't see any compression of the fabric. The slow motion shows an almost 2 dimensional view as it all blacked out I guess due to the lighting. I think its possible the shirt could have been below the ball, but behind the ball instead of touching it.
That said, if its like many other sports, the ref's live decision would stand unless the instant replay conclusively showed otherwise.
I took a few screen captures of freeze-frames of the purported foul and used the "shadow/highlight" tool in Photoshop to bring out the edge of the 9-ball from the shadows, then enlarged them full-size on my monitor. It's still not completely clear, but it does appear to me that the offending mammary passed behind the ball and did not actually make contact at any time. I base this on the fact that it seems that the entire upper edge of the 9-ball is visible at all times. Real tough call, though, even with the help of PS.