Adding bind_id

- V wrapper does not use/need `bind_id`, but let's add it anyway to be up to date.

src/lib.c.v

@@ -20,6 +20,7 @@ pub:
 	event_type   EventType // Event type
 	element      &char     // HTML element ID
 	event_number usize     // Internal WebUI
+	bind_id      usize     // Bind ID
 }
 
 // -- Definitions ---------------------
@@ -69,8 +70,7 @@ fn C.webui_return_string(e &C.webui_event_t, s &char)
 fn C.webui_return_bool(e &C.webui_event_t, b bool)
 
 // -- Interface ----------------------- // not wrapped
-fn C.webui_interface_bind(win Window, element &char, func fn (win Window, event_type EventType, element &char, event_num usize)) Function
+fn C.webui_interface_bind(win Window, element &char, func fn (win Window, event_type EventType, element &char, event_num usize, bind_id usize)) Function
 fn C.webui_interface_set_response(win Window, event_num usize, resp &char)
 fn C.webui_interface_is_app_running() bool
-fn C.webui_interface_get_window_id(win Window) Window
 fn C.webui_interface_get_bind_id(win Window, element &char) Function

src/lib.v

@@ -24,6 +24,7 @@ pub:
 	event_type   EventType // Event type
 	element      string    // HTML element ID
 	event_number usize     // Internal WebUI
+	bind_id      usize     // Bind ID
 }
 
 [params]
@@ -111,6 +112,7 @@ pub fn (w Window) bind[T](element string, func fn (&Event) T) Function {
 			event_type: c_event.event_type
 			element: unsafe { if c_event.element != nil { c_event.element.vstring() } else { '' } }
 			event_number: c_event.event_number
+			bind_id: c_event.bind_id
 		}
 		// Call user callback function and return response.
 		e.@return(func(e))