It avoids a potential segfault after a silent avcodec audio API breakage.

It fixes at least WMAP decoding.

Minor changes by jb@videolan.org

This reverts commit a0f3831c.

DBus is synchronous

(We seldom have non ASCII characters here, but better safe than sorry)

Currently, only the core supports this correctly, however.

Note that this means key configuration values become case sensitive
(case insentivity would be too complicated), but this should not be
a problem so long as the core key<->string functions are always used.

This will allow returning dynamically generated strings

recent xcb_key_symbols_get_keycode() now returns a pointer

Keep old API (as present in Debian Lenny for example) as requested by nefrir
GetModifier() is broken when using the new API, it might be broken as
well when using the old API.

Documents / source code of functions used in GetModifier() are very
welcome, libxcb only ships XML descriptions and the generated source
code is very unreadable.