Joe Girardi might as well save his breath. After watching Brett Gardner narrowly avoid getting injured on a head-first slide into first base yesterday against the Orioles at Ed Smith Stadium, the Yankees manager said he will talk to Gardner about the dangerous maneuver. “I’m not crazy about that,” Girardi said. “I know during the season it becomes instinctual. Right now you don’t want him to get his hand stepped on. I will talk to him [today]. The hard thing about it is that it’s instinctual.’’ One day after Curtis Granderson went down for at least the first month of the season with a fractured right forearm, the Yankees watched Gardner dive into first in a meaningless game. Gardner, who beat out a bunt single with the dangerous slide, knows he was wrong. “It’s not something I should have done,’’ said Gardner, who was limited to 16 games last year due to a right elbow injury that required surgery. “It’s almost a habit. [Girardi] has said enough to me that he probably knows it goes in one ear and out the other. Other people [third base coach Rob Thomson] said something.’’