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.

Use the proper function for common memory operations (memset() for
zeroing, memcpy() for copying, memmove() for moving), instead of
looping through arrays.

By extension, remove loops to reset arrays when they were allocated
with calloc() and thus already zeroed.

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

Instead of calling sprintf or snprintf with a "%s" format string, use
the proper strcpy, strncpy, strdup or strndup 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

(transplanted from 512894f517c423fed0cadeca0d46c6d909403106)

--HG--
extra : transplant_source : Q%28%94%F5%17%C4%23%FE%D0%CA%DE%CA%0DF%C6%D9%09%401%06