in forward declaration replace class keyword when struct is expected

comment out unused parameters

src/Mod/TechDraw/App/EdgeWalker.cpp

@@ -143,6 +143,7 @@ bool EdgeWalker::setSize(int size)
     m_g.clear();
     for (int i = 0; i < size; i++) {
         boost::adjacency_list<>::vertex_descriptor vd = boost::add_vertex(m_g);
+        (void)vd;
     }
     return true;
 }

src/Mod/TechDraw/Gui/TaskSectionView.h

@@ -83,8 +83,8 @@ private:
 
     std::string saveSym;
     std::string saveLabel;
-    bool saveHorizSectionLine;
-    bool saveArrowUpSection;
+  //bool saveHorizSectionLine;
+  //bool saveArrowUpSection;
     Base::Vector3d saveSectionProjDir;
     Base::Vector3d saveSectionOrigin;
     Base::Vector3d saveSectionNormal;