Fix compiler warnings with redefinition of _WIN32_WINNT

diff --git a/TSRM/readdir.h b/TSRM/readdir.h
index 139bc7bb7021545f54e920ac2dc50cbca67ac009..3eec20bd16f8aeff3835a13bc79fe470a535c193 100644 (file)
--- a/TSRM/readdir.h
+++ b/TSRM/readdir.h
@@ -7,7 +7,9 @@
  * on Windows 95/NT.
  */
 
+#ifndef _WIN32_WINNT
 #define _WIN32_WINNT 0x0400
+#endif
 
 #include <windows.h>