fix missing stats when search interrupted

[yorkart]

When -m is specified, the bytes searched part of stats is missing or small.

eg:
command：

rg --stats -m 10 -e 'keyword' /path/to/file

output

...
(10 lines)
...

10 matches
10 matched lines
1 files contained matches
1 files searched
4535 bytes printed
0 bytes searched   ------------------------>  (the field is missing)
0.001751 seconds spent searching
0.003299 seconds