[TD] remove some more superfluous nullptr checks

src/Mod/TechDraw/Gui/TaskCosmeticLine.cpp

@@ -86,7 +86,7 @@ TaskCosmeticLine::TaskCosmeticLine(TechDraw::DrawViewPart* partFeat,
     //existence of partFeat is checked in calling command
 
     m_ce = m_partFeat->getCosmeticEdgeBySelection(m_edgeName);
-    if (m_ce == nullptr) {
+    if (!m_ce) {
         Base::Console().Error("TaskCosmeticLine - bad parameters.  Can not proceed.\n");
         return;
     }