Merge pull request #1 from danmichaelo/patch-1

Fix for PHP >=7.2 NULL is not countable

Author: hoffmann-oss

src/Xml.php

@@ -53,6 +53,7 @@ protected function __construct(
 		$this->root = $root ?? $this;
 		$this->parent = $parent;
 		$this->sub = false;
+		$this->children = [];
 	}
 
 	public static function createRoot(string $name = null): self
@@ -474,4 +475,4 @@ private function calculateVars(\stdClass $parentVars = null)
 		}
 		return $vars;
 	}
-}
+}