0024180: Eliminate CLang / GCC compiler warning -Wswitch

Eliminated warnings -Wswitch shown by gcc
Eliminated two new warnings about wrong initialization order
Eliminated warnings about unused functions.
A few more ICC warnings (type conversions) fixed

src/BRepFill/BRepFill_Pipe.cxx

@@ -142,6 +142,8 @@ void BRepFill_Pipe::Perform(const TopoDS_Wire&  Spine,
   case GeomFill_IsDiscreteTrihedron:
     TLaw = new GeomFill_DiscreteTrihedron();
     break;
+  default:
+    break;
   }
   Handle(GeomFill_CurveAndTrihedron) Loc = 
     new (GeomFill_CurveAndTrihedron) (TLaw);