fix missing parameters

app/src/main/java/acr/browser/lightning/download/LightningDownloadListener.java

@@ -61,7 +61,7 @@ public class LightningDownloadListener implements DownloadListener {
                         public void onClick(DialogInterface dialog, int which) {
                             switch (which) {
                                 case DialogInterface.BUTTON_POSITIVE:
-                                    mDownloadHandler.onDownloadStart(mActivity, mPreferenceManager, url, userAgent, "attachment", null, "");
+                                    mDownloadHandler.onDownloadStart(mActivity, mPreferenceManager, url, userAgent, contentDisposition, mimetype, downloadSize);
                                     break;
                                 case DialogInterface.BUTTON_NEGATIVE:
                                     break;