Have you seen the replay? It's as clear as day, that Berge sticks his leg out to try and play the ball.
Anyone arguing it should have been allowed are just playing with you or being delusional.
It's similar to the ghost goal at Villa, when there are photo stills (proof) of the ball being behind in the goalies hands but behind the post.
However it's a bit of a cliche when people say....we only beat Sunderland because of a dodgy goal that shouldn't have counted
but as already mentioned if the goal is correctly disallowed we continue to play in a positive style and it's likely we still win the game 2-1.