1of1 is default account type

lib/wallet_factory.py

@@ -28,6 +28,9 @@ class WalletFactory(object):
     @classmethod
     def from_seed(self, seed, storage):
         import mnemonic
+        if not seed:
+            return 
+
         words = seed.strip().split()
         try:
             mnemonic.mn_decode(words)
@@ -50,4 +53,5 @@ class WalletFactory(object):
             w = Wallet(storage)
             w.init_seed(seed)
 
+
         return w