+ replace || operator in BoundBox2D with real function names

src/Mod/Mesh/App/Core/Algorithm.cpp

@@ -1103,7 +1103,7 @@ void MeshAlgorithm::CheckFacets(const MeshFacetGrid& rclGrid, const Base::ViewPr
         {
             clBBox3d = clGridIter.GetBoundBox();
             clViewBBox = clBBox3d.ProjectBox(pclProj);
-            if (clViewBBox || clPolyBBox)
+            if (clViewBBox.Intersect(clPolyBBox))
             {
                 // alle Elemente in AllElements sammeln
                 clGridIter.GetElements(aulAllElements);

src/Mod/Mesh/App/Core/Trim.cpp

@@ -71,7 +71,7 @@ void MeshTrimming::CheckFacets(const MeshFacetGrid& rclGrid, std::vector<unsigne
         for (clGridIter.Init(); clGridIter.More(); clGridIter.Next()) {
             clBBox3d = clGridIter.GetBoundBox();
             clViewBBox = clBBox3d.ProjectBox(myProj);
-            if (clViewBBox || clPolyBBox) {
+            if (clViewBBox.Intersect(clPolyBBox)) {
                 // save all elements in AllElements 
                 clGridIter.GetElements(aulAllElements);
             }