Adjust translations for the spacing changes etc. which this introduces.

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.

Its result will be always the same during execution, as it depends on
the hardware present.

--HG--
extra : transplant_source : %F2%D1%1A%84%0F%D4%08%C0%12%09%1A%BBb%7Ef%CC%F2%FB%A3t

Add CC_ATTRIBUTE_CONST macro to the attributes.h.
Run CC_ATTRIBUTE_CONST in configure.
Define SUPPORT_ATTRIBUTE_CONST for GCC 3.
Define XINE_CONST to __attribute__((__const__)) if supported.

--HG--
extra : transplant_source : /26%26%DF%C0%3C%AC%27%5C%B7%B1y%FEQ%8Ay%EE%F1%BD

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--
extra : transplant_source : %B0%D5%3B%D7%1Dy%0A%7E%7D%7C%023%08%B2%CE%D3t%0B3%D7

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.

Also don't reset memory after it's allocated if we do that with
calloc.

- Add a configure test for the attribute, during xine build process.
- Define the attribute as supported when using GCC 2.95 or later
  outside xine build process.
- Use the new XINE_PACKED define instead of the attribute directly.
- Check for SUPPORT_ATTRIBUTE_PACKED rather than doing strange
  subdefines.