Avoid notice when no categories are present

diff --git a/maintenance/parserTests.inc b/maintenance/parserTests.inc
index ba83497..01409c1 100644 (file)
--- a/maintenance/parserTests.inc
+++ b/maintenance/parserTests.inc
@@ -336,7 +336,11 @@ class ParserTest {
                                global $wgOut;
                                $wgOut->addCategoryLinks($output->getCategories());
                                $cats = $wgOut->getCategoryLinks();
-                               $out = $this->tidy( implode( ' ', $cats['normal'] ) );
+                               if ( isset( $cats['normal'] ) ) {
+                                       $out = $this->tidy( implode( ' ', $cats['normal'] ) );
+                               } else {
+                                       $out = '';
+                               }
                        }
 
                        $result = $this->tidy($result);