$10.35 Punk as anthemic as it is authentic, Endless Struggle preaches to the clothespin-and-mohawk set with a baker's dozen songs that are heavy on riffs and the usual scene dogma. That the group strives to make a difference so earnestly and energetically makes it seem beside the point that the Salt Lake City troupe shows so little difference from those who inspired them, one of whom -- G.B.H. -- gets