bench: Fix the multiply-add benchmark

Author: bluss

benches/bench1.rs

@@ -372,15 +372,9 @@ fn add_2d_f32_blas(bench: &mut test::Bencher)
 #[bench]
 fn muladd_2d_f32_regular(bench: &mut test::Bencher)
 {
-    use rblas::Axpy;
-    use rblas::attribute::Transpose;
-    use ndarray::blas::AsBlas;
-    let mut a = OwnedArray::<f32, _>::zeros((64, 64));
-    let b = OwnedArray::<f32, _>::zeros((64, 64));
+    let mut av = OwnedArray::<f32, _>::zeros((64, 64));
+    let bv = OwnedArray::<f32, _>::zeros((64, 64));
     let scalar = 3.1415926535;
-    let len = a.len();
-    let mut av = a.view_mut().into_shape(len).unwrap();
-    let bv = b.view().into_shape(len).unwrap();
     bench.iter(|| {
         av.zip_mut_with(&bv, |a, &b| *a += scalar * b);
     });