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/GeometryTest/GeometryTest_API2dCommands.cxx

@@ -36,7 +36,7 @@
 #include <GeomAbs_Shape.hxx>
 
 #include <stdio.h>
-#ifdef WNT
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif
 

src/GeometryTest/GeometryTest_APICommands.cxx

@@ -39,7 +39,7 @@
 #include <TColStd_Array2OfReal.hxx>
 #include <Precision.hxx>
 #include <stdio.h>
-#ifdef WNT
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif
 

src/GeometryTest/GeometryTest_ConstraintCommands.cxx

@@ -64,9 +64,8 @@
 #include <GC_MakeSegment.hxx>
 #include <GC_MakeArcOfCircle.hxx>
 
-//#ifdef WNT
 #include <stdio.h>
-#ifdef WNT
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif
 Standard_IMPORT Draw_Color DrawTrSurf_CurveColor(const Draw_Color);

src/GeometryTest/GeometryTest_CurveCommands.cxx

@@ -130,7 +130,7 @@
 #include <GCPnts_UniformAbscissa.hxx>
 #include <DBRep.hxx>
 
-#ifdef WNT
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif
 

src/GeometryTest/GeometryTest_PolyCommands.cxx

@@ -29,7 +29,7 @@
 #include <TColgp_Array1OfPnt.hxx>
 #include <TColgp_Array1OfPnt2d.hxx>
 
-#ifdef WNT
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif
 //=======================================================================

src/GeometryTest/GeometryTest_SurfaceCommands.cxx

@@ -61,9 +61,12 @@
 #include <DrawTrSurf_BezierSurface.hxx>
 #include <DrawTrSurf_BSplineSurface.hxx>
 
-#ifdef WNT
+#ifdef _MSC_VER
 #include <stdio.h>
 //#define strcasecmp strcmp Already defined
+#endif
+
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif
 

src/GeometryTest/GeometryTest_TestProjCommands.cxx

@@ -27,7 +27,7 @@
 #include <Draw_Marker3D.hxx>
 
 #include <stdio.h>
-#ifdef WNT
+#ifdef _WIN32
 Standard_IMPORT Draw_Viewer dout;
 #endif