Attempt to fix build

src/game_initialization/multiplayer.cpp

@@ -68,7 +68,7 @@ class mp_manager
 public:
 	// Declare this as a friend to allow direct access to enter_create_mode
 	friend void mp::start_local_game();
-	friend lobby_info* mp::get_lobby_info();
+	friend mp::lobby_info* mp::get_lobby_info();
 
 	mp_manager(const std::optional<std::string> host);
 

src/gui/widgets/chatbox.cpp

@@ -32,6 +32,7 @@
 #include "font/pango/escape.hpp"
 #include "formatter.hpp"
 #include "formula/string_utils.hpp"
+#include "game_initialization/multiplayer.hpp"
 #include "gettext.hpp"
 #include "log.hpp"
 #include "preferences/credentials.hpp"