Fix bug with zoom/select rubberband disappearing when moving above or

to the left of the initial mouse click position


git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@4777 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/gui/qgsmapcanvas.cpp

@@ -2567,7 +2567,7 @@ void QgsMapCanvas::mouseMoveEvent(QMouseEvent * e)
           mCanvasProperties->zoomBox.setTopLeft(mCanvasProperties->rubberStartPoint);
         }
         mCanvasProperties->zoomBox.setBottomRight(e->pos());
-        mRubberBand->setGeometry(mCanvasProperties->zoomBox);
+        mRubberBand->setGeometry(mCanvasProperties->zoomBox.normalized());
         mRubberBand->show();
 #endif