script: don't call TIOCGWINSZ in signal handler

Signed-off-by: Karel Zak <kzak@redhat.com>
script: restore errno in signal handler

References: https://plus.google.com/+LennartPoetteringTheOneAndOnly/posts/gHSscCJkakd
Signed-off-by: Karel Zak <kzak@redhat.com>
mkfs.minix: fix fscanf() format string [coverity scan]

Signed-off-by: Karel Zak <kzak@redhat.com>