Fix items unplaceable due to stack/touch-hurt

mods/nc_fire/node.lua

@@ -33,6 +33,7 @@ minetest.register_node(modname .. ":fire", {
 			damage_radiant = 1,
 			flame_ambiance = 1
 		},
+		stack_max = 1,
 		damage_per_second = 1,
 		sunlight_propagates = true,
 		floodable = true,
@@ -109,6 +110,7 @@ for num = 1, nodecore.fire_max do
 				damage_touch = 1,
 				damage_radiant = 3
 			},
+			stack_max = 1,
 			drop = "",
 			crush_damage = 1,
 			sounds = nodecore.sounds("nc_terrain_crunchy")

mods/nc_lode/ore.lua

@@ -106,9 +106,11 @@ reg("cobble_hot", {
 			cracky = 0,
 			lodey = 1,
 			cobbley = 1,
+			stack_as_node = 1,
 			damage_touch = 1,
 			damage_radiant = 1
-		}
+		},
+		stack_max = 1
 	})
 
 local oreid = 0

mods/nc_optics/glass.lua

@@ -112,6 +112,7 @@ local moltdef = {
 		damage_touch = 1,
 		damage_radiant = 3
 	},
+	stack_max = 1,
 	post_effect_color = {a = 191, r = 255, g = 64, b = 0},
 	liquid_alternative_flowing = modname .. ":glass_hot_flowing",
 	liquid_alternative_source = modname .. ":glass_hot_source",

mods/nc_terrain/node.lua

@@ -310,6 +310,7 @@ regliquid({
 			damage_touch = 1,
 			damage_radiant = 8
 		},
+		stack_max = 1,
 		post_effect_color = {a = 240, r = 255, g = 64, b = 0},
 		sounds = nodecore.sounds("nc_terrain_bubbly")
 	})