FDWrapper: Always reset the internal descriptor to -1

Even if it was a different negative value, which happens for example
with the bpf helper functions which return `-errno`.

(cherry picked from commit eefbe57feca72af4a088e8e872e864dc36e9284e)

diff --git a/pdns/misc.hh b/pdns/misc.hh
index 46e93f7ec15ad7c45f381e8e6c4c97fbc531713f..76887ee69cf2590336fb1852b3e3ddad62580765 100644 (file)
--- a/pdns/misc.hh
+++ b/pdns/misc.hh
@@ -824,9 +824,9 @@ struct FDWrapper
   void reset()
   {
     if (d_fd >= 0) {
-      ::close(d_fd);
-      d_fd = -1;
+      close(d_fd);
     }
+    d_fd = -1;
   }
 
 private: