Corrige crash si objet non supporté à recycler dans scie circulaire

Version 1.2.0

# gpg: Signature faite le sam. 24 nov. 2018 17:41:10 CET
# gpg:                avec la clef RSA 39E8F8BE30B0A49C
# gpg: Impossible de vérifier la signature : Pas de clef publique

circular_saw.lua

@@ -242,6 +242,7 @@ function circular_saw.allow_metadata_inventory_put(
 		local incost = (incount * 8) + microstack:get_count()
 		local maxcost = (stackmax * 8) + 7
 		local cost = circular_saw:get_cost(inv, stackname)
+		if not cost then return 0 end -- NALC Fix crash if cost == nil
 		if (incost + cost) > maxcost then
 			return math.max((maxcost - incost) / cost, 0)
 		end

stairsplus/registrations.lua

@@ -49,6 +49,8 @@ local default_nodes = { -- Default stairs/slabs/panels/microblocks:
 	"desert_sandstone_block",
 	"sandstone_block",
 	"coral_skeleton",
+	"ice",
+	"snowblock",
 }
 
 for _, name in pairs(default_nodes) do
@@ -57,6 +59,11 @@ for _, name in pairs(default_nodes) do
 	local ndef = table.copy(minetest.registered_nodes[nodename])
 	ndef.sunlight_propagates = true
 
+	-- Workaround to fix node orientation (minetest >= 0.4.17.1)
+	if ndef.place_param2 == 0 then
+	   ndef.place_param2 = nil
+	end
+
 	-- Stone and desert_stone drop cobble and desert_cobble respectively.
 	if type(ndef.drop) == "string" then
 		ndef.drop = ndef.drop:gsub(".+:", "")