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_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);