Theme Editor: Made allll destructors virtual

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26895 a1c6a512-1295-4272-9138-f99709370657

utils/themeeditor/gui/codeeditor.h

@@ -56,6 +56,7 @@ class CodeEditor : public QPlainTextEdit
 
 public:
     CodeEditor(QWidget *parent = 0);
+    virtual ~CodeEditor(){ }
 
     void lineNumberAreaPaintEvent(QPaintEvent *event);
     int lineNumberAreaWidth();

utils/themeeditor/gui/configdocument.h

@@ -41,6 +41,7 @@ class NoScrollCombo: public QComboBox
 {
 public:
     NoScrollCombo(QWidget* parent = 0) : QComboBox(parent) {}
+    virtual ~NoScrollCombo(){ }
 
     void wheelEvent(QWheelEvent* event) { event->ignore(); }
 };

utils/themeeditor/gui/editorwindow.h

@@ -46,7 +46,7 @@ class EditorWindow : public QMainWindow
     Q_OBJECT
 public:
     EditorWindow(QWidget *parent = 0);
-    ~EditorWindow();
+    virtual ~EditorWindow();
 
     /* A public function so external widgets can load files */
     void loadTabFromSkinFile(QString fileName);

utils/themeeditor/gui/preferencesdialog.h

@@ -33,7 +33,7 @@ class PreferencesDialog : public QDialog {
     Q_OBJECT
 public:
     PreferencesDialog(QWidget *parent = 0);
-    ~PreferencesDialog();
+    virtual ~PreferencesDialog();
 
     static void setButtonColor(QPushButton* button, QColor color)
     {