Fix spurious synchronization status msgs

Only update target height if it's actually greater than the current target.
Only display "synchronized" when current height equals target.

src/cryptonote_protocol/cryptonote_protocol_handler.inl

@@ -265,14 +265,17 @@ namespace cryptonote
     if(context.m_state == cryptonote_connection_context::state_synchronizing)
       return true;
 
+    uint64_t target = m_core.get_target_blockchain_height();
     if(m_core.have_block(hshd.top_id))
     {
       context.m_state = cryptonote_connection_context::state_normal;
-      if(is_inital)
+      if(is_inital && target == m_core.get_current_blockchain_height())
         on_connection_synchronized();
       return true;
     }
 
+    if (hshd.current_height > target)
+    {
     /* As I don't know if accessing hshd from core could be a good practice,
     I prefer pushing target height to the core at the same time it is pushed to the user.
     Nz. */
@@ -286,6 +289,7 @@ namespace cryptonote
       << " [Your node is " << std::abs(diff) << " blocks (" << ((abs(diff) - diff_v2) / (24 * 60 * 60 / DIFFICULTY_TARGET_V1)) + (diff_v2 / (24 * 60 * 60 / DIFFICULTY_TARGET_V2)) << " days) "
       << (0 <= diff ? std::string("behind") : std::string("ahead"))
       << "] " << ENDL << "SYNCHRONIZATION started");
+    }
     LOG_PRINT_L1("Remote blockchain height: " << hshd.current_height << ", id: " << hshd.top_id);
     context.m_state = cryptonote_connection_context::state_synchronizing;
     context.m_remote_blockchain_height = hshd.current_height;