analyzer: refactoring of analyzer manager

Change-Id: I60268b8bc86e439beb3fca8f4b6a87ea03925bad
Reviewed-on: http://codereview.qt.nokia.com/1049
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/valgrind/valgrindplugin.h

@@ -48,7 +48,7 @@ public:
     ValgrindPlugin() {}
 
     virtual bool initialize(const QStringList &arguments, QString *errorString);
-    virtual void extensionsInitialized();
+    virtual void extensionsInitialized() {}
 };
 
 } // namespace Internal