prevent crash on tumbler restart due to index_cache not including ext…

…ra mix depths

joinmarket/wallet.py

@@ -169,6 +169,13 @@ def read_wallet_file_data(self, filename, pwd=None):
  sys.exit(0)
  if 'index_cache' in walletdata:
  self.index_cache = walletdata['index_cache']
+ if self.max_mix_depth > len(self.index_cache):
+ #This can happen e.g. in tumbler when we need more mixdepths
+ #than currently exist. Since we have no info for those extra
+ #depths, we must default to (0,0) (but sync should find used
+ #adddresses).
+ self.index_cache += [[0,0]] * (
+ self.max_mix_depth - len(self.index_cache))
  decrypted = False
  while not decrypted:
  if pwd: