By Bonnie Stiernberg Back in September, a photo of Kourtney Kardashian and her boyfriend Travis Barker (to whom she subsequently got engaged a month later) in which the Keeping Up with the Kardashians star could be seen sporting a Cannibal Corpse t-shirt made the rounds on the internet. As one might expect, fans of the band pounced on Kardashian for daring to wear the shirt of an act she (presumably) doesn’t listen to, and Cannibal Corpse frontman Chris Barnes weighed in himself, tweeting that Barker and Kardashian are “posers.” Now, however, in a new interview, Barker has responded to the con…