Bugfix: Use empty check instead of isset

If no category tree was found, the array is empty but isset evaluates
to true. This fixes the mistake and uses an empty check instead.

1 files changed, 1 insertions, 1 deletions

diff --git a/core/include/category/main.php b/core/include/category/main.php
index 1f9adf7..066ea26 100644
--- a/core/include/category/main.php
+++ b/core/include/category/main.php
@@ -28,7 +28,7 @@ else {
 #===============================================================================
 # Throw 404 error if category (with parents) could not be found
 #===============================================================================
-if(!isset($categories)) {
+if(empty($categories)) {
 	Application::error404();
 }