Allow villager to claim filled cauldrons.

Fixes #3733

mods/ENTITIES/mobs_mc/villager.lua

@@ -351,7 +351,7 @@ local professions = {
 	leatherworker = {
 		name = N("Leatherworker"),
 		texture = "mobs_mc_villager_leatherworker.png",
-		jobsite = "mcl_cauldrons:cauldron",
+		jobsite = "group:cauldron",
 		trades = {
 			{
 			{ { "mcl_mobitems:leather", 9, 12 }, E1 },
@@ -1007,8 +1007,9 @@ end
 
 ----- JOBSITE LOGIC
 local function get_profession_by_jobsite(js)
+	local is_cauldron = string.find(js, "mcl_cauldrons:cauldron")
 	for k,v in pairs(professions) do
-		if v.jobsite == js then return k end
+		if v.jobsite == js or (is_cauldron and v.jobsite == "group:cauldron") then return k end
 	end
 end