Fix CPFP on change

plugins/ledger/ledger.py

@@ -318,7 +318,7 @@ class Ledger_KeyStore(Hardware_KeyStore):
             for _type, address, amount in tx.outputs():
                 assert _type == TYPE_ADDRESS
                 info = tx.output_info.get(address)
-                if info is not None:
+                if (info is not None) and (len(tx.outputs()) != 1):
                     index, xpubs, m = info
                     changePath = self.get_derivation()[2:] + "/%d/%d"%index
                     changeAmount = amount