Throw an error when the key is invalid

diff --git a/printer_navigation.php b/printer_navigation.php
index 65dec1adb4a409248757ce1048de48ebc4aaa16d..f50bbdc5d983e85f79c234b011fd840b0c51ff7d 100644 (file)
--- a/printer_navigation.php
+++ b/printer_navigation.php
@@ -183,6 +183,10 @@ class Printer_Navigation
                {
                        $this->focus["$scope"] = $key;
                }
+               else
+               {
+                       trigger_error('Invalid key for scope', E_USER_WARNING);
+               }
        }
        
        // ###################################################################