Slight Change to Polls Mod.

[R. Andrew Lamonica]

Because the admin never got back to me about changing the way the polls module works, I took it upon myself to perform a little tweak.  If anyone objects to polls being listed in chronological order or if you want expired polls to still appear on the front page as before, let me know and I’ll change things back.  I was going to have polls appear for a day after they expire sans the vote button, but that looked like it would take more then a one-line tweak, so I skipped it for now.