bzip2: Fix return value when combining --test,-t and -q.

bzip2: Fix return value when combining --test,-t and -q.

When passing -q to get quiet output --test would not display an error
message, but would also suppress the exit 2 code to indicate the file
was corrupt. Only suppress the error message with -q, not the exit value.

This patch comes from Debian.
"bunzip2 -qt returns 0 for corrupt archives"
https://bugs.debian.org/279025