Crashlog: Show frame counters with sync dates

src/network/network.cpp

@@ -87,6 +87,7 @@ uint32 _sync_frame;                   ///< The frame to perform the sync check.
 Date   _last_sync_date;               ///< The game date of the last successfully received sync frame
 DateFract _last_sync_date_fract;      ///< "
 uint8  _last_sync_tick_skip_counter;  ///< "
+uint32 _last_sync_frame_counter;      ///< "
 bool _network_first_time;             ///< Whether we have finished joining or not.
 CompanyMask _network_company_passworded; ///< Bitmask of the password status of all companies.
 
@@ -661,6 +662,7 @@ static void NetworkInitialize(bool close_admins = true)
 	_last_sync_date = 0;
 	_last_sync_date_fract = 0;
 	_last_sync_tick_skip_counter = 0;
+	_last_sync_frame_counter = 0;
 }
 
 /** Non blocking connection to query servers for their game info. */

src/network/network_client.cpp

@@ -336,6 +336,7 @@ void ClientNetworkGameSocketHandler::ClientError(NetworkRecvStatus res)
 			_last_sync_date = _date;
 			_last_sync_date_fract = _date_fract;
 			_last_sync_tick_skip_counter = _tick_skip_counter;
+			_last_sync_frame_counter = _sync_frame;
 
 			/* If this is the first time we have a sync-frame, we
 			 *   need to let the server know that we are ready and at the same

src/network/network_internal.h

@@ -84,6 +84,7 @@ extern uint32 _sync_frame;
 extern Date   _last_sync_date;
 extern DateFract _last_sync_date_fract;
 extern uint8  _last_sync_tick_skip_counter;
+extern uint32  _last_sync_frame_counter;
 extern bool _network_first_time;
 /* Vars needed for the join-GUI */
 extern NetworkJoinStatus _network_join_status;