Lingering potions should not collide with liquids, change behaviors assersion loop to catch nil members

mods/ITEMS/mcl_potions/lingering.lua

@@ -211,7 +211,6 @@ function mcl_potions.register_lingering(name, descr, color, def)
 				vl_projectile.collides_with_entities,
 				vl_projectile.collides_with_solids,
 			},
-			collides_with = {"group:liquid"},
 			on_collide_with_entity = on_collide,
 			on_collide_with_solid = function(self, pos, node)
 				if mod_target and n == "mcl_target:target_off" then

mods/ITEMS/vl_projectile/init.lua

@@ -379,8 +379,9 @@ end
 
 function mod.register(name, def)
 	assert(def._vl_projectile)
-	for _,behavior in pairs(def._vl_projectile.behaviors) do
-		assert(behavior)
+	local behaviors = def._vl_projectile.behaviors
+	for i = 1,#behaviors do
+		assert(behaviors[i])
 	end
 
 	if not def.on_step then