2002-03-29  Morten Welinder  <terra@diku.dk>

	* src/gutils.c (gnm_mem_chunk_new, gnm_mem_chunk_destroy,
	gnm_mem_chunk_alloc, gnm_mem_chunk_free): Keep per-block
	freelists.
	(gnm_mem_chunk_free): g_free chunks that are completely empty.

	* src/value.c (value_get_as_float): Improve precision.
	(value_get_as_int): Take sign into account when (fake-)truncating
	floating point numbers.
	(value_new_error, value_new_error_str, value_new_string,
	value_new_string_str, value_release): Use chunk allocator for
	strings and errors.
	(value_init): Initialise error and string pools.
	(value_shutdown): Free error and string pools.