Rerender a point stroke by force

Fixes #805

src/control/tools/StrokeHandler.cpp

@@ -189,6 +189,12 @@ void StrokeHandler::onButtonReleaseEvent(const PositionInputData& pos)
 	layer->addElement(stroke);
 	page->fireElementChanged(stroke);
 
+	//Manually force the rendering of the stroke, if no motion event occurred inbetween, that would rerender the page.
+	if (stroke->getPointCount() == 2)
+	{
+		this->redrawable->rerenderElement(stroke);
+	}
+
 	stroke = NULL;
 
 	return;