Hi David,
I showed the photo to James and to Bob. Bob said a small amount of thin superglue on the edge of a razor blade or a toothpick toughed right on one of the white fractures should wick it in to fill the crack.
James said that if the dent is bothersome to your playing, he would fill the whole dent with glue, then sand it smooth. You won't feel it much if at all, and it will look a good bit better, though not invisible. This is something that we could do while you wait next time you swing by.
To make it look like it never happened, we'd have to refinish the neck.