as far as repair, if it comes to that, here is what I would do.
Take a q tip with denatured alchohol (would not use acetone, mek or anything that harsh on finish). Dip the q tip in the d.a., then just "touch" the crack in a few spots. This will let the alchohol wick or "pull" down into the crack.
Allow a few minutes for the d.a. to dry thoroughly.
Get some of the "water" thin super glue from your local hobby store, if there isn't one you can order it or maybe find it at a hardware store etc. I would say its worth the extra effort to get the really thin stuff, as it will wick down into the crack way better then the standard viscous superglue.
With a TINY hole in the tip add only a few drops at a time into the crack. DONT overdue it and get superglue all over your bow. Be sure and just use tiny drops with a very very small hole in the tip (small as you can get it). Keep a lint free cloth handy to quickly wipe off any excess etc.
You can lightly sand with 400 grit then steel wool when you have the crack glued up.
Just use common sense, go slow, be patient.