[tex-live] [PATCH] exit with error if restoring a package fails

[Scott Kostyshak]

Otherwise a script might assume that the restore went successfully.

$ sudo /opt/texbin/tlmgr restore pst-mirror 16371
revision 16371 for pst-mirror is not present in
/usr/local/texlive/2013/tlpkg/backups
$ echo $?
0

The attached patch calls finish(1):
$ sudo /opt/texbin/tlmgr restore pst-mirror 16371
revision 16371 for pst-mirror is not present in
/usr/local/texlive/2013/tlpkg/backups
tlmgr: exiting unsuccessfully (status 1).
$ echo $?
1

Best,

Scott
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<     print "revision $rev for $pkg is not present in $opts{'backupdir'}\n";
---
>     tlwarn("revision $rev for $pkg is not present in $opts{'backupdir'}\n");
>     finish(1);