Provide correct bounds for weak opt var arithmetic. Fixes #51.
Provide correct bounds for weak opt var arithmetic. Fixes #51.

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