Fix crash on moving or coping the note while the selection is empty.

This resolves issue #11.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 7c7f7a8147)

src/basket.cpp

@@ -2415,7 +2415,7 @@ void Basket::contentsMouseMoveEvent(TQMouseEvent *event)
 		m_isSelecting      = false; // Don't draw selection rectangle ater drag!
 		m_selectionStarted = false;
 		NoteSelection *selection = selectedNotes();
-		if (selection->firstStacked()) {
+		if (selection && selection->firstStacked()) {
 			TQDragObject *d = NoteDrag::dragObject(selection, /*cutting=*/false, /*source=*/this); // d will be deleted by QT
 		/*bool shouldRemove = */d->drag();
 //		delete selection;
@@ -4204,7 +4204,7 @@ void Basket::doCopy(CopyMode copyMode)
 
 	NoteSelection *selection = selectedNotes();
 	int countCopied = countSelecteds();
-	if (selection->firstStacked()) {
+	if (selection && selection->firstStacked()) {
 		TQDragObject *d = NoteDrag::dragObject(selection, copyMode == CutToClipboard, /*source=*/0); // d will be deleted by QT
 //		/*bool shouldRemove = */d->drag();
 //		delete selection;