From ad5043e285865cb9297e32ce25da93841cf76d3f Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefasab@gmail.com>
Date: Thu, 9 Aug 2012 14:44:18 +0200
Subject: [PATCH] cmdutils: show options in show_help_children only if the
 context has options

Avoid to print a pointless name of the context followed by an empty list.
---
 cmdutils.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/cmdutils.c b/cmdutils.c
index 7d71d6569c..6859692e8b 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -168,8 +168,10 @@ void show_help_options(const OptionDef *options, const char *msg, int mask,
 void show_help_children(const AVClass *class, int flags)
 {
     const AVClass *child = NULL;
-    av_opt_show2(&class, NULL, flags, 0);
-    printf("\n");
+    if (class->option) {
+        av_opt_show2(&class, NULL, flags, 0);
+        printf("\n");
+    }
 
     while (child = av_opt_child_class_next(class, child))
         show_help_children(child, flags);