Rationalized PC compiler defines: require MS_WINDOWS or __BORLANDC__
or __WATCOMC__. Add ALTSEP for PC filesystems.
diff --git a/Include/osdefs.h b/Include/osdefs.h
index 8a6b741..de9d19b 100644
--- a/Include/osdefs.h
+++ b/Include/osdefs.h
@@ -37,8 +37,9 @@
#define DELIM '\n'
#endif
-#if defined(MSDOS) || defined(NT) || defined(__BORLANDC__) || defined(__WATCOMC__)
+#if defined(MS_WINDOWS) || defined(__BORLANDC__) || defined(__WATCOMC__)
#define SEP '\\'
+#define ALTSEP '/'
#define MAXPATHLEN 256
#define DELIM ';'
#endif