0024058: Eliminate compiler warning C4702 in MSVC++ with warning level 4

Got rid of most of warnings of C4702 type: unreachable code.
Returned some #ifdef DEB
Fixed tabs formatting
Fixed some mistakes in code

src/IntTools/IntTools_EdgeFace.cxx

@@ -941,7 +941,7 @@ void IntTools_EdgeFace::CheckData()
     }
   }
   */
-  return 0;
+//  return 0;
 }