(bitset_stats_size, bitset_stats_list,

(bitset_stats_size, bitset_stats_list,
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.