Git: Modernize

* Use auto
* Use override
* Use some member initializers

Change-Id: I3ca000d1c8e4d02331d58b85e68e4d771c636b29
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/git/branchcheckoutdialog.h

@@ -56,8 +56,8 @@ private:
     void updatePopStashCheckBox(bool moveChangesChecked);
 
     Ui::BranchCheckoutDialog *m_ui;
-    bool m_foundStashForNextBranch;
-    bool m_hasLocalChanges;
+    bool m_foundStashForNextBranch = false;
+    bool m_hasLocalChanges = true;
 };
 
 } // namespace Internal