function zscal( N, alpha, x, strideX, offsetX ) {
	var viewX = reinterpret( x, 0 );
	addon.ndarray( N, alpha, viewX, strideX, offsetX );
	return x;
}
Scales a double-precision complex floating-point vector by a double-precision complex floating-point constant.

@param {PositiveInteger} N - number of indexed elements
@param {Complex128} alpha - scalar constant
@param {Complex128Array} x - input array
@param {integer} strideX - `x` stride length
@param {NonNegativeInteger} offsetX - starting index for `x`
@returns {Complex128Array} input array

@example
var Complex128Array = require( '@stdlib/array/complex128' );
var Complex128 = require( '@stdlib/complex/float64/ctor' );

var x = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] );
var alpha = new Complex128( 2.0, 2.0 );

zscal( 3, alpha, x, 1, 0 );
// x => <Complex128Array>[ -2.0, 6.0, -2.0, 14.0, -2.0, 22.0 ]