Link.php: wrong detection of missing parameter for download button.

extension/qfq/qfq/report/Link.php

@@ -237,6 +237,7 @@ class Link {
         TOKEN_MAIL => LINK_ANCHOR,
         TOKEN_PAGE => LINK_ANCHOR,
         TOKEN_DOWNLOAD => LINK_ANCHOR,
+        TOKEN_FILE => NAME_FILE,
         TOKEN_COPY_TO_CLIPBOARD => LINK_ANCHOR,
 
         TOKEN_PICTURE => LINK_PICTURE,
@@ -701,6 +702,7 @@ class Link {
     private function checkParam(array $tokenGiven, array $vars) {
         $countLinkAnchor = 0;
         $countLinkPicture = 0;
+        $countSources = 0;
 
         foreach ($tokenGiven as $token => $value) {
             if (isset($this->tokenMapping[$token])) {
@@ -711,6 +713,11 @@ class Link {
                     case LINK_PICTURE:
                         $countLinkPicture++;
                         break;
+                    case NAME_FILE:
+                    case NAME_URL:
+                    case NAME_PAGE:
+                        $countSources++;
+                        break;
                     default:
                         break;
                 }
@@ -729,7 +736,7 @@ class Link {
             throw new UserReportException ("Token Mail and Target at the same time not possible'" . TOKEN_PAGE . "'", ERROR_MULTIPLE_DEFINITION);
         }
 
-        if (isset($tokenGiven[TOKEN_DOWNLOAD]) && count($vars[NAME_COLLECT_ELEMENTS]) == 0) {
+        if (isset($tokenGiven[TOKEN_DOWNLOAD]) && count($vars[NAME_COLLECT_ELEMENTS]) == 0 && $countSources == 0) {
             throw new UserReportException ("Missing element sources for download", ERROR_MISSING_REQUIRED_PARAMETER);
         }
     }