eina: Fix EINA_INLIST_FOREACH_SAFE macro

eina: Fix EINA_INLIST_FOREACH_SAFE macro

EINA_INLIST_FOREACH_SAFE is very broken and it only works by luck, depending on
the __inlist field being the first one in the struct. Until now.

This commit makes the following snippet to work:

	#include <Eina.h>

	typedef struct _data {
	   char *name;
	   EINA_INLIST;
	} data;

	int
	main()
	{
	   Eina_Inlist *inlist = NULL, *inlist_safe;
	   data *reg, *d;

	   reg = malloc(sizeof(data));
	   inlist = eina_inlist_append(inlist, EINA_INLIST_GET(reg));

	   EINA_INLIST_FOREACH_SAFE(inlist, inlist_safe, d)
	     {
		printf("%p\n", d);
		inlist = eina_inlist_remove(inlist, EINA_INLIST_GET(d));
		free(d);
	     }

	   return 0;
	}

 Patch-by: José Roberto de Souza <zehortigoza@profusion.mobi>
git-svn-id: http://svn.enlightenment.org/svn/e/trunk/eina@76150 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33