Qt4ProjectManager: Fix crash

src/plugins/qt4projectmanager/qt4project.cpp

@@ -960,6 +960,8 @@ Qt4ProFileNode *Qt4Project::rootProjectNode() const
 
 bool Qt4Project::validParse(const QString &proFilePath) const
 {
+    if (!m_rootProjectNode)
+        return false;
     const Qt4ProFileNode *node = m_rootProjectNode->findProFileFor(proFilePath);
     return node && node->validParse();
 }