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/mappingtreeproxy.h b/mappingtreeproxy.h
index 0dd7c8d..158cde9 100644
--- a/mappingtreeproxy.h
+++ b/mappingtreeproxy.h
@@ -13,7 +13,7 @@
 class MappingTreeProxy : public QSortFilterProxyModel {
     Q_OBJECT
     public:
-        explicit MappingTreeProxy(QObject *parent = 0);
+        explicit MappingTreeProxy(QObject *parent = nullptr);
 
     public slots:
         void setFilter(const QString &filter);