Subscribed students can not access their training (see CT#543)

main/inc/local.inc.php

@@ -962,7 +962,7 @@ if ((isset($uidReset) && $uidReset) || (isset($cidReset) && $cidReset)) { // ses
 
 	            api_session_register('_courseUser');
 	        }
-	        if (empty($is_courseAdmin)) { // this user has no status related to this course
+	        if (!isset($is_courseAdmin)) { // this user has no status related to this course
 		    	// is it the session coach or the session admin ?
 
 		    	$tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION);
@@ -1181,4 +1181,4 @@ if (isset($_cid)) {
     $time = api_get_datetime();
 	$sql="UPDATE $tbl_course SET last_visit= '$time' WHERE code='$_cid'";
 	Database::query($sql);
-}
+}