showlog: Fix logfile selection code for the --reverse parsing case
The logic to skip entire logfiles in case there's no chance any
entries in it could be interesting to us didn't work at all in
the reverse parsing case. This patch fixes it so that it produces
an equal amount of lines in both cases. Some simple testing shows
that the output is identical, although reversed as it should be,
when identical options (minus --reverse, naturally) are passed
to the program.
Signed-off-by: Andreas Ericsson <ae@op5.se>