Add signal handlers to ibus-chewing to listen for config changes.

src/IBusChewingEngine-keys.c

 #ifndef IBUS_1_1
 gboolean ibus_chewing_engine_process_key_event_1_2(IBusEngine *engine,
         guint keysym_ignore,  guint  keycode,   guint  modifiers){
     if (modifiers & IBUS_RELEASE_MASK){
         /* Skip release event */
         return TRUE;
     }
     //IBusChewingEngine *self=IBUS_CHEWING_ENGINE(engine);
     //guint keysym=ibus_keymap_lookup_keysym (self->keymap_us,keycode,modifiers);
     //return ibus_chewing_engine_process_key_event(engine, keysym, modifiers);
@@ skipping 198 matching lines @@
     }
     return self_update(self);
 }
 
 void ibus_chewing_engine_candidate_clicked(IBusEngine *engine, guint index,
         guint button, guint state) {
     G_DEBUG_MSG(3,"[I3] cadidate_clicked(-, %u, %u, %u) ... proceed.", index, button, state);
     IBusChewingEngine *self=IBUS_CHEWING_ENGINE(engine);
     self_handle_candidate_clicked(self, index, button, state);
 }
+
+void ibus_config_value_changed(IBusConfig *config, const gchar *section,
+        const gchar *name, GValue *value, gpointer userData) {
+    G_DEBUG_MSG(3,"[I3] ibus_config_value_changed(-, %s, %s, -, -)", section, name);
+    IBusChewingEngine *self=IBUS_CHEWING_ENGINE(userData);
+    self_handle_config_value_changed(self, section, name, value);
+}