OutlineTree to check for null, refs 499

SemanticMediaWiki · Jul 21, 2019 · 5da2a7b · 5da2a7b
1 parent 6b5cb93
commit 5da2a7b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/Outline/OutlineTree.php b/src/Outline/OutlineTree.php
@@ -74,7 +74,7 @@ public function categorizeItem( $vals, $item ) {
 	 * @param $property
 	 */
 	public function addProperty( $property ) {
-		if ( count( $this->items ) > 0 ) {
+		if ( $this->items !== null && count( $this->items ) > 0 ) {
 			foreach ( $this->items as $item ) {
 				$cur_vals = $item->getFieldValues( $property );
 				$this->categorizeItem( $cur_vals, $item );