use virtual destructor in VEditOperations

Signed-off-by: Le Tan <tamlokveer@gmail.com>

src/veditoperations.cpp

@@ -14,3 +14,8 @@ void VEditOperations::insertTextAtCurPos(const QString &text)
     cursor.setPosition(editor->textCursor().position());
     cursor.insertText(text);
 }
+
+VEditOperations::~VEditOperations()
+{
+
+}

src/veditoperations.h

@@ -9,6 +9,7 @@ class VEditOperations
 {
 public:
     VEditOperations(VEdit *editor, VNoteFile *noteFile);
+    virtual ~VEditOperations();
     virtual bool insertImageFromMimeData(const QMimeData *source) = 0;
     virtual bool insertURLFromMimeData(const QMimeData *source) = 0;