_inline_rowScale_preMultiply(row, scale) {
        for (let col = 0; col < this._width; col++) {
            let v1 = this.cell(col, row);
            let v2 = v1.times(scale);
            let k = (row*this._width + col)*2;
            this._buffer[k] = v2.real;
            this._buffer[k+1] = v2.imag;
        }
    }
@param {!int} row
@param {!Complex} scale
@private