HEDGE FUND CHIEF SHORT AND $WEET By TERI BUHL and KAJA WHITEHOUSE Posted: 4:37 am November 9, 2008 Renowned short seller Jim Chanos is emerging as a potential front-runner for this year's prize for top hedge-fund performer. According to performance data obtained by The Post, Chanos' short-only fund, Ursus, is up 53.2 percent through the end of October, besting the 30 percent performance Chanos booked in 2007, when he was ranked one of the top 100 traders. For October alone, the $5 billion fund earned its investors a whopping 17.8 percent. Meanwhile, Chanos' long-short fund, Kynikos International, is up 11.16...