doc: fix code example which may provoke warning

diff --git a/docs/style-guide.txt b/docs/style-guide.txt
index 5bb3441..381275a 100644 (file)
--- a/docs/style-guide.txt
+++ b/docs/style-guide.txt
@@ -682,7 +682,7 @@ Then have long options defined:
        static const struct option <applet>_long_options[] = {
                { "list",    0, NULL, 't' },
                { "extract", 0, NULL, 'x' },
-               { NULL }
+               { NULL, 0, NULL, 0 }
        };
 
 And a code block similar to the following near the top of your applet_main()