Fix resource leak

CID:34707

plugins/flake/textshape/dialogs/TableOfContentsStyleModel.cpp

@@ -48,6 +48,11 @@ TableOfContentsStyleModel::TableOfContentsStyleModel(const KoStyleManager *manag
 
 }
 
+TableOfContentsStyleModel::~TableOfContentsStyleModel()
+{
+    delete m_styleThumbnailer;
+}
+
 QModelIndex TableOfContentsStyleModel::index(int row, int column, const QModelIndex &parent) const
 {
     if (row < 0 || column < 0 || column > 1) {

plugins/flake/textshape/dialogs/TableOfContentsStyleModel.h

@@ -30,7 +30,7 @@ class TableOfContentsStyleModel : public QAbstractTableModel
 {
 public:
     TableOfContentsStyleModel(const KoStyleManager *manager, KoTableOfContentsGeneratorInfo *info);
-
+    ~TableOfContentsStyleModel() override;
     int rowCount(const QModelIndex &parent) const override;
     int columnCount(const QModelIndex &parent) const override;
     QVariant data(const QModelIndex &index, int role) const override;