simplewallet: don't subtract 1 to estimate blockchain height

in case it returns 0, and other uses don't, plus it's a estimation anyway.

src/simplewallet/simplewallet.cpp

@@ -3705,7 +3705,7 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
         if (std::cin.eof() || !command_line::is_yes(confirm))
           CHECK_AND_ASSERT_MES(false, false, tr("account creation aborted"));
 
-        m_wallet->set_refresh_from_block_height(m_wallet->estimate_blockchain_height()-1);
+        m_wallet->set_refresh_from_block_height(m_wallet->estimate_blockchain_height());
         m_wallet->explicit_refresh_from_block_height(true);
         m_restore_height = m_wallet->get_refresh_from_block_height();
       }