Fix bounds computation for .. operator
Fix bounds computation for .. operator

nathanielbaxter/libminizinc,nathanielbaxter/libminizinc,jjdekker/libminizinc,nathanielbaxter/libminizinc,nathanielbaxter/libminizinc,jjdekker/libminizinc,tias/libminizinc,jjdekker/libminizinc,tias/libminizinc,jjdekker/libminizinc