A No. If you’ve already sacrificed part of your previous vacation to accommodate your boss, I’d be wary of making this a habit. The boss may grow to expect that you’ll drop everything whenever there’s a problem.
Say, “You know I take pride in helping out in a genuine crisis. I’ve done it before and I’ll do it again. At the same time, I’ve earned some vacation and, as you know, I’ve planned this one for seven months. Would you like my best ideas on how I can help make your life easier while I’m away?” This way, you reinforce your team-player status while clearly underscoring your desire not to lose another vacation.