bug#79414: the ratio output by "gzip -l" is less than 0

[shi xuantong]

gzip's version: 1.14
OS: openEuler
compiler:gcc-12.3.1

Reproduce steps:
echo "hiasdastysjdoyiojsad7saihdsd08y8768r" | gzip >> a.gz
gzip -l a.gz

result:

[cid:b070a7f1-da0a-4210-82e6-bd96683273d1]