processes plugin: Remove unnecessary call of realloc(3).

processes plugin: Remove unnecessary call of realloc(3).

Hi Florian (et al)

> you're right, the (re-)allocation of the memory can probably be avoided
> if the function is turned into one with the following prototype:
> -- 8< --
>  static int *ps_read_tasks (int pid,
>     unsigned long *ret_num_proc,
>     unsigned long *ret_num_lwp);
> -- >8 --

Mmm, why not something like: "static int ps_read_task(pid)"?
This returns the number of task for pid passed as argument.
(AFAIK the function only return the number ot threads), why
we need the ret_num_proc and the ret_num_lwp parameters?

My proposal is attached (code is always cleaner than explanations :P)

Regards,
  Andres

Signed-off-by: Florian Forster <octo@huhu.verplant.org>