Fixed file size rounding error.

[iterma]

#5 Rounding errors have been corrected for file sizes.

Not important per see, but some values didn't look aesthetically correct
(at least not to me 😉).

value	old	new
0	0 value	0 B
1	0 value	1 B
2	0 value	2 B
500	0,49 KiB	500 B
1 023	1 KiB	1023 B
1 024	1 KiB	1 KiB
1 025	1 KiB	1 KiB
1 048 570	1023,99 KiB	1023,99 KiB
1 048 571	1024 KiB	1 MiB
1 048 572	1024 KiB	1 MiB
16 866 345	16,08 MiB	16,09 MiB
16 887 317	16,1 MiB	16,11 MiB
16 960 717	16,17 MiB	16,18 MiB
16 981 689	16,19 MiB	16,2 MiB
19 487 785	18,58 MiB	18,59 MiB
19 508 757	18,6 MiB	18,61 MiB
20 200 817	19,26 MiB	19,27 MiB
20 242 759	19,31 MiB	19,3 MiB
1 073 736 581	1023,99 MiB	1023,99 MiB
1 073 736 582	1023,99 MiB	1 GiB
1 073 736 583	1023,99 MiB	1 GiB

[kxxt]

Thanks for your contribution!