Change return code check in CTRL-C sigint test of orbit integration interruption, because Python 3.8 now seems to (correctly) return -2 rather than 1
Change return code check in CTRL-C sigint test of orbit integration interruption, because Python 3.8 now seems to (correctly) return -2 rather than 1

jobovy/galpy,jobovy/galpy,jobovy/galpy,jobovy/galpy