Fixed memory leak (Joerg: phew, I'm not the only one writing stupid code ;)

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@6956 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/io/file_manager.cpp

@@ -232,8 +232,9 @@ XMLNode *FileManager::createXMLTree(const std::string &filename)
 {
     io::IXMLReader *xml_reader = createXMLReader(filename);
     if(!xml_reader) return NULL;
-    return new XMLNode(xml_reader);
+    XMLNode* node = new XMLNode(xml_reader);
     xml_reader->drop();
+    return node;
 }   // getXMLTree
 
 //-----------------------------------------------------------------------------