bitset_stats_list_reverse, bitset_stats_size,
bitset_stats_count, bitset_stats_list, bitset_stat_list_reverse):
Use bitset_bindex, not int or unsigned int or size_t, to count bits.
(bitset_stats_bytes, bitset_stats_init):
Use size_t, not unsigned int, to count bytes.
(bitset_percent_histogram_print,
bitset_log_histogram_print, bitset_stats_print_1):
Use proper printf formats for width of integer types.
(_): New macro.
(bitset_stats_set, bitset_stats_reset, bitset_stats_test): Don't
name locals "index", as it generates unnecessary warnings on some
hosts that have an "index" function.
(bitset_stats_print_1, bitset_stats_print, bitset_stats_read,
bitset_stats_write): Wrap strings in _() if they need translation.
(bitset_stats_set, bitset_stats_reset): Do not assume that bitset_word
is the same width as int.
