fix #3680 (trezor: spending from multisig)

follow-up of #3621 (Make Electrum work with trezorlib 0.9.0)

plugins/trezor/plugin.py

@@ -294,10 +294,10 @@ class TrezorCompatiblePlugin(HW_PluginBase):
                                 s = []
                             node = self.ckd_public.deserialize(xpub)
                             return self.types.HDNodePathType(node=node, address_n=s)
-                        pubkeys = map(f, x_pubkeys)
+                        pubkeys = list(map(f, x_pubkeys))
                         multisig = self.types.MultisigRedeemScriptType(
                             pubkeys=pubkeys,
-                            signatures=map(lambda x: bfh(x)[:-1] if x else b'', txin.get('signatures')),
+                            signatures=list(map(lambda x: bfh(x)[:-1] if x else b'', txin.get('signatures'))),
                             m=txin.get('num_sig'),
                         )
                         if script_gen == SCRIPT_GEN_NATIVE_SEGWIT: