isl_union_*_mul_isl_int: pass address of isl_int to callback

[isl.git] / test_inputs / application2.omega

{[x] : x >= 0 && x <= 20 }
{[x] -> [y] : y = 2x}
{[y]: Exists ( alpha : 2alpha = y && 0 <= y && y <= 40)}