PVS: V595 A pointer was utilized before it was verified against nullptr

src/Mod/TechDraw/Gui/QGEPath.cpp

@@ -289,8 +289,8 @@ void QGEPath::clearMarkers()
         return;
     }
     for (auto& m: m_markers) {
-        m->hide();
         if (m != nullptr) {
+            m->hide();
             QGraphicsScene* s = m->scene();
             if (s != nullptr) {
                 s->removeItem(m);           //should this be setParentItem(nullptr) instead??