PETE TOWNSHEND of THE WHO  says his hearing problems have returned, which may put the future of the band in jeopardy.He tells "Rolling Stone", quote, "If my hearing is going to be a problem, we're not delaying shows. We're finished. I can't really see any way around the issue."Pete suffers from a disorder called tinnitus . . . which is marked by a ringing or some other persistent sound in one or both of the ears. One of the common causes of it is NOISE-INDUCED HEARING LOSS.The Who has already been forced to scrap plans for a tour this year and an appearance at the Coachella music festival. Their only show on the books is a May 30th charity show in London.