By Jeff Dedekker, Leader-PostGOO GOO DOLLS8 p.m., Tonight Casino Regina Show LoungeLabelling the music of the Goo Goo Dolls as "radio-friendly rock" is one sure method of getting on Johnny Rzeznik's bad side.Taking a break after a recent rehearsal in Los Angeles to discuss the band's current Canadian tour, Rzeznik responded strongly when asked if the label was a fair assessment."I think a lot of people that write about us are assholes," said the 45year-old frontman."A lot of music critics pooh pooh and toss us off as being a semivapid pop band. They probably don't even listen to us."Alth