TaskHub: Make instance() return a QObject*

Change-Id: I508cd2df7ad8de02c8e46fe65e6905d1a41b2bb9
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/projectexplorer/taskhub.cpp

@@ -102,7 +102,7 @@ void TaskHub::addCategory(Core::Id categoryId, const QString &displayName, bool
     emit m_instance->categoryAdded(categoryId, displayName, visible);
 }
 
-TaskHub *TaskHub::instance()
+QObject *TaskHub::instance()
 {
     return m_instance;
 }

src/plugins/projectexplorer/taskhub.h

@@ -43,7 +43,7 @@ class PROJECTEXPLORER_EXPORT TaskHub : public QObject
 {
     Q_OBJECT
 public:
-    static TaskHub *instance();
+    static QObject *instance();
 
     // Convenience overload
     static void addTask(Task::TaskType type, const QString &description,