fixed memory leak when display multframe, share for everyone，want to help others

[mingBee]

when I use cornerstone to display multframe and scroll to change, The memory increase very fast . I found the reason is possMessage to worker, transfer param do not add and the type of pixelData param is Unit8, not arraybuff. I change like this:

cornerstoneWADOImageLoader.js processDecodeTask method 831 line function processDecodeTask(imageFrame, transferSyntax, pixelData, options) { let passs_pixelData = new Uint8Array(pixelData.slice(0)); //copy pixelData, pass worker not clear data ,new .. prevent .buffer error
var priority = options.priority || undefined; // var transferList = options.transferPixelData ? [passs_pixelData.buffer] : undefined; var transferList = [passs_pixelData.buffer]; //worker transfer var loaderOptions = (0, _options.getOptions)(); var strict = loaderOptions.strict, decodeConfig = loaderOptions.decodeConfig, useWebWorkers = loaderOptions.useWebWorkers;

if (useWebWorkers === false) { if (codecsInitialized === false) { (0, _decodeJPEG.initializeJPEG2000)(decodeConfig); (0, _decodeJPEGLS.initializeJPEGLS)(decodeConfig);

  codecsInitialized = true;
}

return new Promise(function (resolve, reject) {
  try {
    var decodeArguments = [imageFrame, transferSyntax, passs_pixelData, decodeConfig, options];
    var decodedImageFrame = _decodeImageFrame2.default.apply(undefined, decodeArguments);

    (0, _calculateMinMax2.default)(decodedImageFrame, strict);

    resolve(decodedImageFrame);
  } catch (error) {
    reject(error);
  }
});

}

return _webWorkerManager2.default.addTask('decodeTask', { imageFrame: imageFrame, transferSyntax: transferSyntax, pixelData: passs_pixelData.buffer, //pass buffer,make transfer effect options: options }, priority, transferList).promise; }