i3bar: Send mouse wheel events to child too

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>

i3bar/include/child.h

@@ -73,6 +73,12 @@ void stop_child(void);
  */
 void cont_child(void);
 
+/*
+ * Whether or not the child want click events
+ *
+ */
+bool child_want_click_events(void);
+
 /*
  * Generates a click event, if enabled.
  *