Comment print statements in battery_box.lua (#650)

This deprecates the variables onesize_products and twosize_products by using a shared definition table.
With these changes, it should be easier to add new programs in the future.

New feature: Tooltips are added to all programs. (only applies to newly placed nodes)

technic/machines/register/battery_box.lua

@@ -92,7 +92,7 @@ local dirtab = {
 
 local tube = {
 	insert_object = function(pos, node, stack, direction)
-		print(minetest.pos_to_string(direction), dirtab[direction.x+2+(direction.z+2)*2], node.param2)
+		--print(minetest.pos_to_string(direction), dirtab[direction.x+2+(direction.z+2)*2], node.param2)
 		if direction.y == 1
 			or (direction.y == 0 and dirtab[direction.x+2+(direction.z+2)*2] == node.param2) then
 			return stack
@@ -106,7 +106,7 @@ local tube = {
 		end
 	end,
 	can_insert = function(pos, node, stack, direction)
-		print(minetest.pos_to_string(direction), dirtab[direction.x+2+(direction.z+2)*2], node.param2)
+		--print(minetest.pos_to_string(direction), dirtab[direction.x+2+(direction.z+2)*2], node.param2)
 		if direction.y == 1
 			or (direction.y == 0 and dirtab[direction.x+2+(direction.z+2)*2] == node.param2) then
 			return false

technic_cnc/cnc_materials.lua

@@ -10,6 +10,7 @@ local function register_material(nodename, tiles_override, descr_override)
 	end
 
 	local groups = {
+		cracky = ndef.groups.cracky,
 		crumbly = ndef.groups.crumbly,
 		choppy = ndef.groups.choppy,
 		flammable = ndef.groups.flammable,
@@ -19,6 +20,12 @@ local function register_material(nodename, tiles_override, descr_override)
 		oddly_breakable_by_hand = ndef.groups.oddly_breakable_by_hand,
 		not_in_creative_inventory = 1,
 	}
+	local count = 0
+	for _ in pairs(groups) do
+		count = count + 1
+	end
+	assert(count >= 2, "Too few groups. node name=" .. nodename)
+
 	local tiles = tiles_override or { ndef.tiles[#ndef.tiles] }
 	assert(tiles and #tiles == 1, "Unknown tile format in node name=" .. nodename)