Fixed not working codecoverage under windows

Author: Patrick Hausmann

PHP/CodeCoverage/Report/Node.php

@@ -135,7 +135,9 @@ public function getId()
     public function getPath()
     {
         if ($this->path === NULL) {
-            if ($this->parent === NULL) {
+           if ($this->parent === NULL ||
+               $this->parent->getPath() == NULL
+                   ) {
                 $this->path = $this->name;
             } else {
                 $this->path = $this->parent->getPath() . '/' . $this->name;