fix various compiler warnings

src/Mod/TechDraw/Gui/QGIPrimPath.cpp

@@ -82,6 +82,7 @@ void QGIPrimPath::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
 {
     QGIView *view = dynamic_cast<QGIView *> (parentItem());    //this is temp for debug??
     assert(view != 0);
+    Q_UNUSED(view);
     if(!isSelected() && !isHighlighted) {
         setPrettyNormal();
     }