0022972: Eliminate macro definitions that has compiler-provided analogs (WNT and so on)

1) Macro definition WNT replaced by _WIN32 and _MSC_VER for platform and compiler detection accordingly.
2) Macro definition LIN replaced by __linux__ macro.
3) Macro definition DEB replaced by OCCT_DEBUG macro.

src/DrawTrSurf/DrawTrSurf_Triangulation.cxx

@@ -29,8 +29,6 @@
 #include <TColStd_Array1OfInteger.hxx>
 
 #include <stdio.h>
-//#ifdef WNT
-//#endif
 //=======================================================================
 //function : DrawTrSurf_Triangulation
 //purpose  : 

src/DrawTrSurf/DrawTrSurf_Triangulation2D.cxx

@@ -29,7 +29,7 @@
 #include <TColgp_Array1OfPnt2d.hxx>
 #include <TColStd_Array1OfInteger.hxx>
 
-#ifdef WNT
+#ifdef _MSC_VER
 #include <stdio.h>
 #endif