HDWallet: remove repeated assertion

src/hdwallet.js

@@ -55,10 +55,9 @@ HDWallet.fromBase58 = function(string) {
 
   var payload = buffer.slice(0, -4)
   var checksum = buffer.slice(-4)
-  var newChecksum = crypto.hash256(payload).slice(0, 4)
 
+  var newChecksum = crypto.hash256(payload).slice(0, 4)
   assert.deepEqual(newChecksum, checksum, 'Invalid checksum')
-  assert.equal(payload.length, HDWallet.LENGTH, 'Invalid BIP32 string')
 
   return HDWallet.fromBuffer(payload)
 }

test/fixtures/hdwallet.json

@@ -183,11 +183,11 @@
         "string": "xprvQQQQQQQQQQQQQQQQCviVfJSKyQ1mDYahRjijr5idH2WwLsEd4Hsb2Tyh8RfQMuPh7f7RtyzTtdrbdqqsunu5Mm3wDvUAKRHSC34sJ7in334"
       },
       {
-        "exception": "Invalid BIP32 string",
+        "exception": "Invalid buffer length",
         "string": "SQ8nQ2jWarXqLo9oHGKKP6iQDsQbPRftq7rjtYY3hqJRPQRgrmeunFnDKbH7B15yGPLZBrhhkKXx3pwD6LcBooJRGq6x7matAXpMsgn"
       },
       {
-        "exception": "Invalid BIP32 string",
+        "exception": "Invalid buffer length",
         "string": "37hdAfw3aMiWcBGPP2ywmY5jizTeSSP5GXayKY3RxkEZ7f3SBnRE1pN6eY3VzGkgx6vbdNtuKfrHgEaYvW9KkFZCycaPvWiA9TtfmeVB592Sf9RfSzQzXo72"
       }
     ],