fix: undefined candle_type_def in lookahead-analysis

Author: xmatthias

freqtrade/optimize/analysis/lookahead.py

@@ -125,6 +125,7 @@ def prepare_data(self, varholder: VarHolder, pairs_to_load: list[DataFrame]):
 
         backtesting = Backtesting(prepare_data_config, self.exchange)
         self.exchange = backtesting.exchange
+        self.local_config["candle_type_def"] = prepare_data_config["candle_type_def"]
         self._fee = backtesting.fee
         backtesting._set_strategy(backtesting.strategylist[0])