2.49.2:

Gio:
* FilterInputStream: Added a constructor.
 (Krzysztof Kosiński, Kjell Ahlstedt) Bug #572471
* FilterOutputStream:
 - Correct the property_base_stream() return type.
 (Krzysztof Kosiński) Bug #572471
 (Krzysztof Kosiński, Kjell Ahlstedt) Bug #572471
* InputStream: Added a constructor, is_closed(), has_pending(),
 set_pending(), clear_pending()
 (Krzysztof Kosiński, Kjell Ahlstedt) Bug #572471
* OutputStream: Added a constructor, is_closed(), is_closing(),
 has_pending(), set_pending(), and clear_pending().
 (Krzysztof Kosiński, Kjell Ahlstedt) Bug #572471
* Pollable, InputStream, OutputStream: Return -1 on error in vfuncs.
 (Kjell Ahlstedt)

gmmproc:
* Make h2def.py recognize some GDK_PIXBUF macros
 (Kjell Ahlstedt)
* Add optional argument err_return_value in _WRAP_VFUNC
 (Kjell Ahlstedt)

Build:
* Visual Studio build files: Update projects
 (Chun-wei Fan)