MDL-49143 LTI: Fix missing resource id

mod/lti/locallib.php

@@ -362,6 +362,12 @@ function lti_build_request($instance, $typeconfig, $course, $typeid = null, $isl
         'context_label' => $course->shortname,
         'context_title' => $course->fullname,
     );
+    if (!empty($instance->id)) {
+        $requestparams['resource_link_id'] = $instance->id;
+    }
+    if (!empty($instance->resource_link_id)) {
+        $requestparams['resource_link_id'] = $instance->resource_link_id;
+    }
     if ($course->format == 'site') {
         $requestparams['context_type'] = 'Group';
     } else {
@@ -370,7 +376,7 @@ function lti_build_request($instance, $typeconfig, $course, $typeid = null, $isl
     }
     $placementsecret = $instance->servicesalt;
 
-    if ( isset($placementsecret) && ($islti2 ||
+    if ( !empty($instance->id) && isset($placementsecret) && ($islti2 ||
          $typeconfig['acceptgrades'] == LTI_SETTING_ALWAYS ||
          ($typeconfig['acceptgrades'] == LTI_SETTING_DELEGATE && $instance->instructorchoiceacceptgrades == LTI_SETTING_ALWAYS))) {