regress: Support NULL fdset arguments to select

[adns] / regress / hplayback.c.m4

diff --git a/regress/hplayback.c.m4 b/regress/hplayback.c.m4
index 475144a..792952f 100644 (file)
--- a/regress/hplayback.c.m4
+++ b/regress/hplayback.c.m4
@@ -150,6 +150,11 @@ static void P_updatetime(void) {
 static void Pfdset(fd_set *set, int max) {
   int r, c;
   char *ep;
+
+  if (!set) {
+    Pstring("null","null fdset pointer");
+    return;
+  }
   
   if (vb2.buf[vb2.used++] != hm_squote[hm_squote) Psyntax("fd set start not [");
   FD_ZERO(set);