Multisig: revert part of "reformatting"

Broken by fe9ec6de06

lib/wallet.py

@@ -1566,13 +1566,13 @@ class Deterministic_Wallet(Abstract_Wallet):
 
 class BIP32_Wallet(Deterministic_Wallet):
     # abstract class, bip32 logic
+    root_name = 'x/'
 
     def __init__(self, storage):
         Deterministic_Wallet.__init__(self, storage)
         self.master_public_keys  = storage.get('master_public_keys', {})
         self.master_private_keys = storage.get('master_private_keys', {})
         self.gap_limit = storage.get('gap_limit', 20)
-        self.root_name = 'x/'
 
     def is_watching_only(self):
         return not bool(self.master_private_keys)