tmpfile, clean-temp: Fix invocation of GetVersionEx.

[gnulib.git] / lib / clean-temp.c

diff --git a/lib/clean-temp.c b/lib/clean-temp.c
index b05550a..ef926e5 100644 (file)
--- a/lib/clean-temp.c
+++ b/lib/clean-temp.c
@@ -583,6 +583,11 @@ supports_delete_on_close ()
     {
       OSVERSIONINFO v;
 
+      /* According to
+         <http://msdn.microsoft.com/en-us/library/windows/desktop/ms724451(v=vs.85).aspx>
+         this structure must be initialised as follows:  */
+      v.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
+
       if (GetVersionEx (&v))
         known = (v.dwPlatformId == VER_PLATFORM_WIN32_NT ? 1 : -1);
       else