Stairs: unbind table groups (#2036)

Unbind table groups for base block, stairs, slabs.

diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
index a8f72e81297400902094f335a19e500115c3e886..6e98d74ec82043e2d3bb582a368c8fb84aad0862 100644 (file)
--- a/mods/stairs/init.lua
+++ b/mods/stairs/init.lua
@@ -60,7 +60,8 @@ function stairs.register_stair(subname, recipeitem, groups, images, description,
                        stair_images[i].backface_culling = true
                end
        end
-       groups.stair = 1
+       local new_groups = table.copy(groups)
+       new_groups.stair = 1
        minetest.register_node(":stairs:stair_" .. subname, {
                description = description,
                drawtype = "mesh",
@@ -69,7 +70,7 @@ function stairs.register_stair(subname, recipeitem, groups, images, description,
                paramtype = "light",
                paramtype2 = "facedir",
                is_ground_content = false,
-               groups = groups,
+               groups = new_groups,
                sounds = sounds,
                selection_box = {
                        type = "fixed",
@@ -137,7 +138,8 @@ local slab_trans_dir = {[0] = 8, 0, 2, 1, 3, 4}
 -- Node will be called stairs:slab_<subname>
 
 function stairs.register_slab(subname, recipeitem, groups, images, description, sounds)
-       groups.slab = 1
+       local new_groups = table.copy(groups)
+       new_groups.slab = 1
        minetest.register_node(":stairs:slab_" .. subname, {
                description = description,
                drawtype = "nodebox",
@@ -145,7 +147,7 @@ function stairs.register_slab(subname, recipeitem, groups, images, description,
                paramtype = "light",
                paramtype2 = "facedir",
                is_ground_content = false,
-               groups = groups,
+               groups = new_groups,
                sounds = sounds,
                node_box = {
                        type = "fixed",