Fix DEBUG_PRINT for older MS C Compilers
Fix DEBUG_PRINT for older MS C Compilers

Support was added for variadic macros in the RTM version of Visual Studio
2005 (CL Version 14), but there are variants of the version 14 compiler
included in SDKs released before Visual Studio 2005 itself which do not
support them. Fix the non-DEBUG version of win32unix to compile correctly
and not display a warning for DEBUG_PRINT calls in
`otherlibs/win32unix/select.c`.

gerdstolpmann/ocaml,eliberis/ocaml,eliberis/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,eliberis/ocaml,msprotz/ocaml,yunxing/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,eliberis/ocaml,msprotz/ocaml,msprotz/ocaml,yunxing/ocaml,msprotz/ocaml,yunxing/ocaml,yunxing/ocaml,msprotz/ocaml,yunxing/ocaml