fanotify.7: Declare handle_events() in example code as 'static'

To avoid warning "no previous prototype for..."
when compiling with "-Wmissing-prototypes"

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/fanotify.7

@@ -485,7 +485,7 @@ Listening for events stopped.
 
 /* Read all available fanotify events from the file descriptor 'fd' */
 
-void
+static void
 handle_events(int fd)
 {
     const struct fanotify_event_metadata *metadata;