Are those cracks at the back or belly? I suspect the belly. The wood seems a bit thick for bending without consequence. If on the belly then since the string will be pulling it closed tighter, its generally not an issue accept for asthetics. Often, it cracks at the surface growth ring and by the time the bow is finished, you get past it. Other times not, but I've squeezed cyano glue the best that I can and they've all held up. At times I've even done a sinew bandaid or colored thread wrapping around the crack for decoration. Since you're giving the bow to someone else, you'll have to make a judgement call as to longevity and reliability sake after your reinforcement session.