patch from Mark Vakoc for regression tests on Windows. the NaN problem

* win32/Makefile.msvc: patch from Mark Vakoc for regression tests
  on Windows.
* xpath.c: the NaN problem also shows up on Borland
Daniel
diff --git a/xpath.c b/xpath.c
index d6d65e7..c964e37 100644
--- a/xpath.c
+++ b/xpath.c
@@ -10922,7 +10922,7 @@
         case XPATH_BOOLEAN:
 	    return(res->boolval);
         case XPATH_NUMBER:
-#if defined(_MSC_VER) && (_MSC_VER == 1200)
+#if defined(__BORLANDC__) || (defined(_MSC_VER) && (_MSC_VER == 1200))
 	    return((res->floatval == ctxt->context->proximityPosition) &&
 	           (!xmlXPathIsNaN(res->floatval))); /* MSC pbm Mark Vakoc !*/
 #else