perl: install private Error.pm if the site version is older than our own

diff --git a/git-cvsserver.perl b/git-cvsserver.perl
index 68aa75255e21ff8231fe2f54e5772f8cbb026fce..25816c5a21285cae1d8e42f46f26126a03c6631f 100755 (executable)
--- a/git-cvsserver.perl
+++ b/git-cvsserver.perl
@@ -843,6 +843,7 @@ sub req_update
         if ( defined ( $wrev )
              and defined($meta->{revision})
              and $wrev == $meta->{revision}
+             and defined($state->{entries}{$filename}{modified_hash})
              and not exists ( $state->{opt}{C} ) )
         {
             $log->info("Tell the client the file is modified");