[TD] remove some more superfluous nullptr checks

src/Mod/TechDraw/App/DrawProjGroup.cpp

@@ -549,7 +549,7 @@ std::pair<Base::Vector3d,Base::Vector3d> DrawProjGroup::getDirsFromFront(std::st
 
     Base::Vector3d projDir, rotVec;
     DrawProjGroupItem* anch = getAnchor();
-    if (anch == nullptr) {
+    if (!anch) {
         Base::Console().Warning("DPG::getDirsFromFront - %s - No Anchor!\n",Label.getValue());
         throw Base::RuntimeError("Project Group missing Anchor projection item");
     }