* alloc-pool.h (ALLOC_POOL_ID_TYPE): New type.
	(struct alloc_pool_def): New element 'id'.
	* alloc-pool.c (fancy_abort): Extern function prototype.
	(abort): Macro which uses fancy_abort.
	(struct allocation_object_def): New structure.
	(ALLOCATION_OBJECT_PTR_FROM_USER_PTR): New macro.
	(USER_PTR_FROM_ALLOCATION_OBJECT_PTR): New macro.
	(last_id): New variable.
	(create_alloc_pool): Add the offset of u.data to size of element,
	increase and use last_id.
	(free_alloc_pool): Do the checking only when ENABLE_CHECKING.
	(pool_alloc): Likewise. Set ID for elements.
	(pool_free): Check whether the PTR was allocated from POOL.

From-SVN: r66711