Add texture for inventory icon:

'home_gui_inv.png':
- Based on 'House' by barretr: https://openclipart.org/detail/3318
- License: CC0

README.md

@@ -41,3 +41,6 @@ This module is open source, so it's distributed freely. If you find it useful th
 ## License
 
 [BSD-3-Clause](https://raw.github.com/cornernote/minetest-home_gui/master/LICENSE), Copyright © 2013-2014 [Brett O'Donnell](http://cornernote.github.io/)
+
+Textures:
+- home_gui_inv.png: CC0 (based on [House by barretr](https://openclipart.org/detail/3318))

home_gui/init.lua

@@ -65,8 +65,6 @@ else
 	local use_sfinv = (core.global_exists("sfinv_buttons") and core.settings:get("inventory") == "sfinv") or false
 end
 
-local ui_icon = nil
-
 
 -- get_formspec
 home_gui.get_formspec = function(player)
@@ -89,7 +87,7 @@ if use_sfinv then
 		action = function(player)
 			player:set_inventory_formspec(home_gui.get_formspec(player, "home_gui"))
 		end,
-		image = ui_icon,
+		image = "home_gui_inv.png",
 	})
 end