fix recently introduced double-free

src/exchange-lib/exchange_api_common.c

@@ -38,8 +38,8 @@
  */
 int
 TALER_EXCHANGE_verify_coin_history (const char *currency,
-                                     const struct TALER_CoinSpendPublicKeyP *coin_pub,
-                                     json_t *history,
+				    const struct TALER_CoinSpendPublicKeyP *coin_pub,
+				    json_t *history,
                                     struct TALER_Amount *total)
 {
   size_t len;

src/exchange/taler-exchange-httpd_deposit.c

@@ -218,11 +218,11 @@ TEH_DEPOSIT_handler_deposit (struct TEH_RequestHandler *rh,
   if (0 < TALER_amount_cmp (&deposit.deposit_fee,
                             &deposit.amount_with_fee))
   {
+    GNUNET_break_op (0);
     return TEH_RESPONSE_reply_external_error (connection,
 					      TALER_EC_DEPOSIT_NEGATIVE_VALUE_AFTER_FEE,
                                               "deposited amount smaller than depositing fee");
   }
-  TEH_KS_release (key_state);
   
   res = verify_and_execute_deposit (connection,
                                     &deposit);