In file included from c:\mingw32\bin\../lib/gcc/mingw32/4.5.2/include/c++/bits/stl_algobase.h:68:0,
                 from c:\mingw32\bin\../lib/gcc/mingw32/4.5.2/include/c++/bits/char_traits.h:41,
                 from c:\mingw32\bin\../lib/gcc/mingw32/4.5.2/include/c++/string:42,
                 from ..\..\src/addon/manager_ui.hpp:19,
                 from C:\src\wesnoth\src\game_initialization\multiplayer_lobby.cpp:21:
c:\mingw32\bin\../lib/gcc/mingw32/4.5.2/include/c++/bits/stl_iterator_base_funcs.h: In function 'void std::__advance(_RandomAccessIterator&, _Distance, std::random_access_iterator_tag) [with _RandomAccessIterator = config::const_child_iterator, _Distance = int]':
c:\mingw32\bin\../lib/gcc/mingw32/4.5.2/include/c++/bits/stl_iterator_base_funcs.h:173:7:   instantiated from 'void std::advance(_InputIterator&, _Distance) [with _InputIterator = config::const_child_iterator, _Distance = unsigned int]'
C:\src\wesnoth\src\game_initialization\multiplayer_lobby.cpp:987:26:   instantiated from here
c:\mingw32\bin\../lib/gcc/mingw32/4.5.2/include/c++/bits/stl_iterator_base_funcs.h:152:7: error: no match for 'operator+=' in '__i += __n'