componentlib MDL-20966 Added a guard to prevent a php warning during upgrade

diff --git a/lib/componentlib.class.php b/lib/componentlib.class.php
index 43a4be3427266198efe0d92ae0c70a5f35bfcb21..516d13c0dfdadbe7622c2c7c9ff403949fbf486c 100644 (file)
--- a/lib/componentlib.class.php
+++ b/lib/componentlib.class.php
@@ -502,7 +502,9 @@ class component_installer {
                         continue;
                     }
                     $component[0]=trim($component[0]);
-                    $component[1]=trim($component[1]);
+                    if (!empty($component[1])) {
+                        $component[1]=trim($component[1]);
+                    }
                     if (!empty($component[2])) {
                         $component[2]=trim($component[2]);
                     }