0032402: Coding Rules - eliminate msvc warning C4668 (symbol is not defined as a preprocessor macro, replacing with '0' for directive)

Make preprocessor expressions consistent with respect to guard expressions.

Fixed usage of macros __QNX__, IRIX, OCCT_DEBUG, DO_INVERSE, DRAW, CHFI3D_DEB by value.
Removed obsolete hack for Sun Workshop 5.0 compiler.

src/BRepFill/BRepFill_Draft.cxx

@@ -285,7 +285,7 @@ static Standard_Boolean GoodOrientation(const Bnd_Box& B,
     TopExp::Vertices(myWire, Vf, Vl);
     if (Vf.IsSame(Vl)) myWire.Closed(Standard_True);
   }
-#if DRAW
+#ifdef DRAW
   if (Affich) {
     DBRep::Set("TheWire", myWire);
   }
@@ -425,7 +425,7 @@ static Standard_Boolean GoodOrientation(const Bnd_Box& B,
   Handle(Geom_Plane) Plan = new (Geom_Plane)(Pt, myDir);
   Surf = new (Geom_RectangularTrimmedSurface) (Plan,-L, L, -L, L); 
 
-#if DRAW
+#ifdef DRAW
   if (Affich) {
     char* Temp = "ThePlan" ;
     DrawTrSurf::Set(Temp, Surf);
@@ -486,7 +486,7 @@ static Standard_Boolean GoodOrientation(const Bnd_Box& B,
   Handle(Geom_Curve) TC = new (Geom_TrimmedCurve) (L, 0, Length);
 
 
-#if DRAW
+#ifdef DRAW
   if (Affich > 2) {
      TC = new (Geom_Circle) (gp::XOY(), Length);
   }

src/BRepFill/BRepFill_Pipe.cxx

@@ -300,7 +300,7 @@ void BRepFill_Pipe::Perform(const TopoDS_Wire&  Spine,
   RemLoc.Remove(myLast);
   myLast = RemLoc.GetResult();
   
-#if DRAW
+#ifdef DRAW
   if (Affich) {
     DBRep::Set("theprof",  TheProf);
     DBRep::Set("thefirst", myFirst);

src/BRepFill/BRepFill_PipeShell.cxx

@@ -732,7 +732,7 @@ void BRepFill_PipeShell::SetForceApproxC1(const Standard_Boolean ForceApproxC1)
     }
     // eap 5 Jun 2002 occ332, end modif
   }
-#if DRAW
+#ifdef DRAW
   if (Affich) {
     DBRep::Set("PipeFirst", myFirst);
     DBRep::Set("PipeLast",  myLast);

src/BRepFill/BRepFill_Sweep.cxx

@@ -625,7 +625,7 @@ static void BuildFace(const Handle(Geom_Surface)& S,
     }
 
   WW = B.Wire();
-#if DRAW
+#ifdef DRAW
   if (Affich)
     DBRep::Set("wire-on-face", WW);
 #endif
@@ -853,7 +853,7 @@ static Standard_Boolean Filling(const TopoDS_Shape& EF,
     WithE4 = Standard_True;
   }
 
-#if DRAW
+#ifdef DRAW
   if (Affich) {
     DBRep::Set("Fill_Edge1", E1);
     DBRep::Set("Fill_Edge2", E2);
@@ -939,7 +939,7 @@ static Standard_Boolean Filling(const TopoDS_Shape& EF,
     */
   }
 
-#if DRAW
+#ifdef DRAW
   if (Affich) { 
       char* Temp = "Surf_Init" ;
       DrawTrSurf::Set(Temp, Surf);
@@ -1258,7 +1258,7 @@ static Standard_Boolean Filling(const TopoDS_Shape& EF,
   if (ToReverseResult)
     Result.Reverse();
 
-#if DRAW
+#ifdef DRAW
   if (Affich) DBRep::Set("BoucheTrou", Result);
 #endif
 
@@ -2064,7 +2064,7 @@ BRepFill_Sweep::BRepFill_Sweep(const Handle(BRepFill_SectionLaw)& Section,
        return Standard_False;  
      }
     E = MkE.Edge();
-#if DRAW
+#ifdef DRAW
     if (Affich) {
       sprintf(name,"Surf_%d", ipath);
       char* Temp = name;