Fix many errors from native wchar_t on windows

indra/llcommon/llapp.cpp

indra/llcommon/llerror.cpp

indra/llcommon/llfile.cpp

indra/llcommon/stringize.h

indra/llvfs/lldir.cpp

indra/llvfs/lldir_win32.cpp

indra/llvfs/lldiriterator.cpp

indra/llwindow/llwindowwin32.cpp

indra/newview/llappviewer.cpp

indra/newview/llappviewerwin32.cpp

indra/newview/lldirpicker.cpp

indra/newview/llfilepicker.cpp

indra/newview/lllocalbitmaps.cpp

indra/newview/llmachineid.cpp

indra/newview/llviewerwindow.cpp