Various clang warning fixes

Mostly nullptr, one missing include that wasn't really missed, and a
stray ;

1 files changed, 1 insertions, 1 deletions

diff --git a/mappingtreeview.h b/mappingtreeview.h
index 22abaa6..0adcc54 100644
--- a/mappingtreeview.h
+++ b/mappingtreeview.h
@@ -15,7 +15,7 @@
 class MappingTreeView : public SmTreeView {
     Q_OBJECT
     public:
-        MappingTreeView(QWidget *parent = 0);
+        MappingTreeView(QWidget *parent = nullptr);
 
     signals:
         void addMapping();