handle list saved offers

Author: yungwine

mytoncore.py

@@ -3066,7 +3066,7 @@ def WriteBookmarkData(self, bookmark):
 	def GetSaveOffers(self):
 		bname = "saveOffers"
 		saveOffers = local.db.get(bname)
-		if saveOffers is None:
+		if saveOffers is None or isinstance(saveOffers, list):
 			saveOffers = dict()
 			local.db[bname] = saveOffers
 		return saveOffers