-tbu options make the capture files wrong

[iddq]

./slsnif /dev/ttyUSB0 -tbu -i /tmp/in -o /tmp/out

root@debian:/usr/src/slsnif/src# hexdump -Cv /tmp/out 
00000000  0a 54 6f 74 61 6c 20 62  79 74 65 73 20 74 72 61  |.Total bytes tra|
00000010  6e 73 6d 69 74 74 65 64  3a 20 33 32 00 2a 0a 00  |nsmitted: 32.*..|
00000020  0a 54 6f 74 61 6c 20 62  79 74 65 73 20 74 72 61  |.Total bytes tra|
00000030  6e 73 6d 69 74 74 65 64  3a 20 33 32 00 00 04 02  |nsmitted: 32....|
00000040  0a 54 6f 74 61 6c 20 62  79 74 65 73 20 74 72     |.Total bytes tr|
0000004f