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

--HG--
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Now that the macro are either imported from the system or defined by
configure. don't define them in every source file.

All the initialisation functions returning a new object instance that
was allocated through malloc() or calloc() can get the malloc
attribute so that the compiler can optimise their call.

When using a variable to store the result of strlen(), make sure its
type is size_t just like the function returns, rather than using a
smaller type like int.

--HG--
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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--
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