It's called communication. Vanek covered Little, moved to his left to receive the puck if it squirted out in front, but pointed out Little to Hodgson so Cody could cover him. Vanek foolishly believed Hodgson knew how to cover someone.
Check the replay again there. Vanek covered nobody. The reality of the whole play is that 3 sabres were on Kane behind the net and they allowed him to get a pass off. End of story. Still early in the game.