calc_stable_points is being run when it shouldn't be

[mnwhite]

Types that descend from IndShockConsumerType are (apparently) trying to run calc_stable_points(), probably as part of post_solve(). This doesn't generate an error, but it does print a message to screen, and we don't want that happening all the time. The fix is probably just a one-liner for each class that's doing this. I'll get to it soon.