fix missing include for systems with err.h

diff --git a/regress/netcat.c b/regress/netcat.c
index 7c29e0cf95a2dea85bd38774dcac2bf1b798831d..98a08b1eceaeb12b4d0561f37b5fc3fd6535be76 100644 (file)
--- a/regress/netcat.c
+++ b/regress/netcat.c
@@ -61,6 +61,9 @@
 #  include <sys/poll.h>
 # endif
 #endif
+#ifdef HAVE_ERR_H
+# include <err.h>
+#endif
 
 /* Telnet options from arpa/telnet.h */
 #define IAC    255