Create int_eq constraint instead of int_lin_eq
Create int_eq constraint instead of int_lin_eq

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