regress: Support NULL fdset arguments to select

[adns] / regress / hcommon.c

diff --git a/regress/hcommon.c b/regress/hcommon.c
index e63a8cd..301fb2f 100644 (file)
--- a/regress/hcommon.c
+++ b/regress/hcommon.c
@@ -167,6 +167,10 @@ void Tvbbytes(const void *buf, int len) {
 void Tvbfdset(int max, const fd_set *fds) {
   int i;
   const char *comma= "";
+  if (!fds) {
+    Tvba("null");
+    return;
+  }
   Tvba("[");
   for (i=0; i<max; i++) {
     if (!FD_ISSET(i,fds)) continue;