Fix namespace to get course picture

main/inc/lib/course.lib.php

@@ -1,6 +1,7 @@
 <?php
 /* For licensing terms, see /license.txt*/
 
+use Chamilo\CoreBundle\Entity\Course;
 use Chamilo\CoreBundle\Entity\ExtraField as EntityExtraField;
 use Chamilo\CourseBundle\Component\CourseCopy\CourseBuilder;
 use Chamilo\CourseBundle\Component\CourseCopy\CourseRestorer;
@@ -4531,6 +4532,7 @@ class CourseManager
             if (Skill::isAllowed($user_id, false)) {
                 $em = Database::getManager();
                 $objUser = api_get_user_entity($user_id);
+                /** @var Course $objCourse */
                 $objCourse = $em->find('ChamiloCoreBundle:Course', $course['real_id']);
                 $objSession = $em->find('ChamiloCoreBundle:Session', $session_id);