[BUG] Sparse host call throws #3703

TEST(ArrayFireSparse, HostExtractionCrash) {
    int size = 8;
    af::info();

    // Create lazy nodes
    af::array values = af::constant(1.0, size, f64);
    af::array row_ptr = af::iota(af::dim4(size + 1), af::dim4(1), s32);
    af::array col_idx = af::constant(0, size, s32);

    // Create sparse array
    af::array sp = af::sparse(size, 4, values, row_ptr, col_idx, AF_STORAGE_CSR);
    try {
        double* host_ptr = sp.host<double>();
    }
    catch(af::exception const& e) { FAIL() << e.what(); }
}