* nscd/mem.c (mempool_alloc): Round array size to 16 bytes

* nscd/mem.c (mempool_alloc): Round array size to 16 bytes

	in oldtotal and newtotal calculation.
	* nscd/nscd-client.h (struct mapped_database): Add datasize
	field.
	* nscd/nscd_helper.c (get_mapping): Initialize datasize field.
	(__nscd_get_map_ref): Get a new mapping even if mapping's data_size
	increased.
	(__nscd_cache_search): Add checks to make sure we never reference
	data beyond the current mapping.