Rename "wmav3" to "wmapro" in xine-lib's internals to line up xine-lib's
nomenclature with what everyone else calls it and knows it as.
[Tweaked by ds to avoid API change.]

Tell xine-lib that when it finds wmapro, look to ffmpeg.

ffmpeg's wmapro decoder is unique in that it puts out samples that
are floats, not 16-bit ints. These need to be converted.

This requires external ffmpeg.

This requires that many other files include config.h themselves.
Also convert <config.h> to "config.h".

Add warning flags to the DEBUG_CFLAGS too.

Using asprintf() instead of malloc() + sprintf() reduces the lines of
code in xine-lib (moving the allocation to the C library or asprintf
replacement), makes it safer to access the string and can also improve
performance whenever the value returned by a function was used as
parameter, as before it had to run the function twice in almost every
case (once for strlen(), once for sprintf()).

The xine_xmalloc() function is going to be deprecated, as its
behaviour is rarely needed as such, and it's thus misused.

With this, almost all uses of xine_xmalloc() with static size (for
instance the value returned by sizeof()) or with a size that is
guaranteed not to be zero (like strlen()+1) are replaced with calls to
either calloc(1, ...) or malloc().

malloc() is used whenever the allocated memory is going to be
immediately overwritten, while calloc() is used in every other case,
as it sets the whole memory area to zero.

--HG--
extra : transplant_source : %8F%98%EC%02%1E%83%F0s%06X%83C%205Y%80%B12%CC%E1