Fix warnings.

diff --git a/src/frontends/qt/ButtonController.cpp b/src/frontends/qt/ButtonController.cpp
index c8644abb85b1673b5b06e3db24505aff6b5124e5..d2910c88c1d1c9ae21afe15cc2d00692fa9e1940 100644 (file)
--- a/src/frontends/qt/ButtonController.cpp
+++ b/src/frontends/qt/ButtonController.cpp
@@ -47,7 +47,7 @@ static void setWidgetEnabled(QWidget * obj, bool enabled)
 class CheckedLineEdit
 {
 public:
-       CheckedLineEdit(QLineEdit * input, QWidget * label = 0);
+       CheckedLineEdit(QLineEdit * input, QWidget * label = nullptr);
        bool check() const;
 
 private:
@@ -93,7 +93,8 @@ public:
        typedef QList<CheckedLineEdit> CheckedWidgetList;
 
        Private()
-               : okay_(0), apply_(0), cancel_(0), restore_(0), auto_apply_(0), default_(0),
+               : okay_(nullptr), apply_(nullptr), cancel_(nullptr),
+                       restore_(nullptr), auto_apply_(nullptr), default_(nullptr),
                        policy_(ButtonPolicy::IgnorantPolicy)
        {}