fix: make the for_sale mark persistent to false when a petz is bought

petz/api/api_tamagochi.lua

@@ -126,5 +126,5 @@ petz.abandon_pet = function(self, msg)
 	petz.remove_tamed_by_owner(self, true)
 	petz.drop_dreamcatcher(self)
 	self.init_tamagochi_timer = false -- no more timing
-	self.for_sale = false -- not for sale
+	self.for_sale = kitz.remember(self, "for_sale", false) -- not for sale
 end

petz/petz/leopard_mobkit.lua

@@ -16,7 +16,7 @@ for i = 1, 2  do
 
 	local pet_name
 	local description
-	local skin_colors = {}
+	local skin_colors
 	local textures = {}
 	local mutation