input/keyboard: fix Group# bindings for keyboard groups

The keyboard group's effective keyboard layout was never being changed
due to a condition that incorrectly preventing it from being performed.
The IPC event that follows the change was correctly being prevented.

sway/input/keyboard.c

@@ -626,11 +626,13 @@ static void handle_modifier_event(struct sway_keyboard *keyboard) {
 		determine_bar_visibility(modifiers);
 	}
 
-	if (wlr_device->keyboard->modifiers.group != keyboard->effective_layout &&
+	if (wlr_device->keyboard->modifiers.group != keyboard->effective_layout) {
-			!wlr_keyboard_group_from_wlr_keyboard(wlr_device->keyboard)) {
 		keyboard->effective_layout = wlr_device->keyboard->modifiers.group;
+
+		if (!wlr_keyboard_group_from_wlr_keyboard(wlr_device->keyboard)) {
 			ipc_event_input("xkb_layout", keyboard->seat_device->input_device);
 		}
+	}
 }
 
 static void handle_keyboard_modifiers(struct wl_listener *listener,