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

Instead of creating strings through a series os string copy and
concatenations, use directly the appropriate printf-like function.

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

Some instances of "key colour" remain; ffmpeg is unmodified.

This change has caused two strings with two translations to collide (the
strings have become identical since some instances already used "colour").
I have therefore arbitrarily dropped the first of the differing translations,
the one for the string at src/video_out/video_out_directfb.c:1365.