Fix building issues.

src/framework/core/config.cpp

@@ -28,6 +28,7 @@
 Config::Config()
 {
     m_confsDoc = OTMLDocument::create();
+    m_fileName = "";
 }
 
 bool Config::load(const std::string& file)

src/framework/core/config.h

@@ -58,7 +58,7 @@ public:
     ConfigPtr asConfig() { return static_self_cast<Config>(); }
 
 private:
-    std::string m_fileName = "";
+    std::string m_fileName;
     OTMLDocumentPtr m_confsDoc;
 };