Cleanup: free plot data on exit

Some widgets copy the full plot info. Free these data on exit to
prevent monstrous valgrind reports.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

profile-widget/profilewidget2.cpp

@@ -178,6 +178,11 @@ ProfileWidget2::ProfileWidget2(QWidget *parent) : QGraphicsView(parent),
 #endif
 }
 
+ProfileWidget2::~ProfileWidget2()
+{
+	free_plot_info_data(&plotInfo);
+}
+
 #ifndef SUBSURFACE_MOBILE
 void ProfileWidget2::addActionShortcut(const Qt::Key shortcut, void (ProfileWidget2::*slot)())
 {

profile-widget/profilewidget2.h

@@ -73,6 +73,7 @@ public:
 	};
 
 	ProfileWidget2(QWidget *parent = 0);
+	~ProfileWidget2();
 	void resetZoom();
 	void scale(qreal sx, qreal sy);
 	void plotDive(const struct dive *d = 0, bool force = false, bool clearPictures = false, bool instant = false);

profile-widget/tankitem.cpp

@@ -32,6 +32,11 @@ TankItem::TankItem(QObject *parent) :
 	hAxis = nullptr;
 }
 
+TankItem::~TankItem()
+{
+	free(pInfoEntry);
+}
+
 void TankItem::setData(DivePlotDataModel *model, struct plot_info *plotInfo, struct dive *d)
 {
 	// If there is nothing to plot, quit early.

profile-widget/tankitem.h

@@ -15,6 +15,7 @@ class TankItem : public QObject, public QGraphicsRectItem
 
 public:
 	explicit TankItem(QObject *parent = 0);
+	~TankItem();
 	void setHorizontalAxis(DiveCartesianAxis *horizontal);
 	void setData(DivePlotDataModel *model, struct plot_info *plotInfo, struct dive *d);
 

qt-models/diveplotdatamodel.cpp

@@ -14,6 +14,11 @@ DivePlotDataModel::DivePlotDataModel(QObject *parent) :
 	memset(&plot_deco_state, 0, sizeof(struct deco_state));
 }
 
+DivePlotDataModel::~DivePlotDataModel()
+{
+	free_plot_info_data(&pInfo);
+}
+
 int DivePlotDataModel::columnCount(const QModelIndex&) const
 {
 	return COLUMNS;

qt-models/diveplotdatamodel.h

@@ -73,6 +73,7 @@ public:
 		COLUMNS
 	};
 	explicit DivePlotDataModel(QObject *parent = 0);
+	~DivePlotDataModel();
 	int columnCount(const QModelIndex &parent = QModelIndex()) const override;
 	QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
 	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;