cryptonote_protocol: less strict check on top version on connect

This allows peers who synced past a fork on the wrong height
to reorg to the right chain after they updated their software
to include the new version.

src/cryptonote_protocol/cryptonote_protocol_handler.inl

@@ -315,7 +315,7 @@ namespace cryptonote
   bool t_cryptonote_protocol_handler<t_core>::get_payload_sync_data(CORE_SYNC_DATA& hshd)
   {
     m_core.get_blockchain_top(hshd.current_height, hshd.top_id);
-    hshd.top_version = m_core.get_hard_fork_version(hshd.current_height);
+    hshd.top_version = m_core.get_ideal_hard_fork_version(hshd.current_height);
     hshd.cumulative_difficulty = m_core.get_block_cumulative_difficulty(hshd.current_height);
     hshd.current_height +=1;
     return true;