wallet2: fix incorrect patch for determining fork rules

Half of the patch was correct, but half was introducing another bug,
where a wallet asking for a fork that the daemon does not know about
yet would decide to use those rules.

src/wallet/wallet2.cpp

@@ -9463,7 +9463,7 @@ bool wallet2::use_fork_rules(uint8_t version, int64_t early_blocks) const
   result = m_node_rpc_proxy.get_earliest_height(version, earliest_height);
   throw_on_rpc_response_error(result, "get_hard_fork_info");
 
-  bool close_enough = height >=  earliest_height - early_blocks; // start using the rules that many blocks beforehand
+  bool close_enough = height >= earliest_height - early_blocks && earliest_height != std::numeric_limits<uint64_t>::max(); // start using the rules that many blocks beforehand
   if (close_enough)
     LOG_PRINT_L2("Using v" << (unsigned)version << " rules");
   else