build fails on win32, at filedialogimpl-win32.cpp

Hi, I encountered a compile error under win32:

src/ui/dialog/filedialogimpl-win32.cpp: In function 'int Inkscape::UI::Dialog::<unnamed>::sanitizeWindowSizeParam(int, int, int, int)':
src/ui/dialog/filedialogimpl-win32.cpp:103:17: error: 'lower' was not declared in this scope
src/ui/dialog/filedialogimpl-win32.cpp: At global scope:
src/ui/dialog/filedialogimpl-win32.cpp:100:5: warning: unused parameter 'minimum'
src/ui/dialog/filedialogimpl-win32.cpp: In static member function 'static UINT_PTR Inkscape::UI::Dialog::FileSaveDialogImplWin32::GetSaveFileName_hookproc(HWND__*, UINT, WPARAM, LPARAM)':
src/ui/dialog/filedialogimpl-win32.cpp:1735:74: warning: passing NULL to non-pointer argument 1 of 'HWND__* CreateWindowExA(DWORD, const CHAR*, const CHAR*, DWORD, int, int, int, int, HWND__*, HMENU__*, HINSTANCE__*, void*)'

( detail is in attachment )

The build environment is:

OS=> Windows7, 32-bits
revno => 9701 from trunk

build step is the same as webpage:
http://wiki.inkscape.org/wiki/index.php/Win32Port