drawers aren't ground content (#91)

see pandorabox-io/pandorabox.io#836

init.lua

@@ -351,6 +351,7 @@ if drawers.mcl_loaded then
 		description = S("Wooden Trim"),
 		tiles = {"drawers_trim.png"},
 		groups = {drawer_connector = 1, handy = 1, axey = 1, flammable = 3, wood = 1, building_block = 1, material_wood = 1},
+		is_ground_content = false,
 		_mcl_blast_resistance = 15,
 		_mcl_hardness = 2,
 	})
@@ -359,6 +360,7 @@ else
 		description = S("Wooden Trim"),
 		tiles = {"drawers_trim.png"},
 		groups = {drawer_connector = 1, choppy = 3, oddly_breakable_by_hand = 2},
+		is_ground_content = false,
 	})
 end
 

lua/api.lua

@@ -287,6 +287,7 @@ function drawers.register_drawer(name, def)
 	def.paramtype2 = "facedir"
 	def.legacy_facedir_simple = true
 	def.groups = def.groups or {}
+	def.is_ground_content = def.is_ground_content == true
 	def.drawer_stack_max_factor = def.drawer_stack_max_factor or 24
 
 	-- events

lua/controller.lua

@@ -420,6 +420,7 @@ local function register_controller()
 	def.paramtype = "light"
 	def.paramtype2 = "facedir"
 	def.legacy_facedir_simple = true
+	def.is_ground_content = false
 
 	-- add pipe connectors, if pipeworks is enabled
 	if pipeworks_loaded then