refactor: use complex/float64/base/scale

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---

Author: kgryte

lib/node_modules/@stdlib/blas/base/zdscal/lib/ndarray.js

@@ -21,6 +21,7 @@
 // MODULES //
 
 var reinterpret = require( '@stdlib/strided/base/reinterpret-complex128' );
+var scale = require( '@stdlib/complex/float64/base/scale' ).strided;
 
 
 // MAIN //
@@ -71,8 +72,7 @@ function zdscal( N, da, zx, strideZX, offsetZX ) {
 	sx = strideZX * 2;
 
 	for ( i = 0; i < N; i++ ) {
-		zx64[ ix ] *= da;
-		zx64[ ix+1 ] *= da;
+		scale( da, zx64, 1, ix, zx64, 1, ix );
 		ix += sx;
 	}
 	return zx;