ABC-TV critic Joel Siegel has left the earth — dead from cancer at 63. Tough break, sad news, nice guy (if a little too nice to too many movies), too soon. Condolences to friends, family, colleagues. The last time Siegel was on my radar screen was when he got into that snarl with Kevin Smith over Siegel walking out on Clerks 2. I could mention this and that but let’s let it go for now.