Update cscal.c

Author: martin-frbg

kernel/zarch/cscal.c

@@ -358,7 +358,7 @@ int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r, FLOAT da_i,
       float res = 0.0;
       if (isnan(da_r)) res = da_r;
       while (j < n) {
-
+	if (!dummy2 || !isnan(x[i]))
         x[i] = res;
         x[i + 1] = res;
         i += 2;