[Wallet] Trivial cleanup of HD wallet changes

src/wallet/wallet.cpp

@@ -1495,7 +1495,7 @@ CPubKey CWallet::GenerateNewHDMasterKey()
 
         // write the key&metadata to the database
         if (!AddKeyPubKey(key, pubkey))
-            throw std::runtime_error("CWallet::GenerateNewKey(): AddKey failed");
+            throw std::runtime_error(std::string(__func__)+": AddKeyPubKey failed");
     }
 
     return pubkey;