Ron Baker’s courage in going up to lay a hard foul on Anthony Davis’ dunk attempt Saturday in New Orleans has cost him. Along with receiving three stitches to repair a bloody cheek, Baker suffered an orbital fracture, the team announced Tuesday. It’s an injury that could keep him out for a week but Baker, the Knicks said, was fitted for a mask Tuesday and the club is calling him “day-to-day.’’ The Knicks are hopeful the mask arrives by Wednesday, though Baker may have to practice in it first before he appears in a game. Coach Jeff Hornacek said the Pelicans doctors looked at Baker but didn’t determine the fracture and the Knicks even announced that evening he was eligible to return to the game. He went on to log 1:32 in the fourth quarter with what was later proved to be a broken facial bone. Baker came out of nowhere to attempt a block on Davis. Davis made the dunk and earned the foul call.