fixed working version of matrix multiplcation

Tests/isa/Cprograms/benchmark/matrixmul/matrixmul.c

@@ -20,7 +20,7 @@ void *malloc(size_t size);
 void init_seq(double *a, const unsigned n_rows_a, const unsigned n_cols_a) {
     for (size_t i = 0; i < n_rows_a; i++) {
         for (size_t j = 0; j < n_cols_a; j++) {
-            a[i*n_cols_a + j] = i*n_cols_a + j;
+            a[i*n_cols_a + j] = 2.0;
         }
     }
 }
@@ -148,7 +148,7 @@ int main(void) {
     /* For measuring time */
     double t0, t1;
 
-    const unsigned scale = 1;
+    const unsigned scale = 3;
     const unsigned n_rows_a = 4 * scale;
     const unsigned n_cols_a = 3 * scale;
     const unsigned n_rows_b = 3 * scale;