print snapshot tree: clamp indentation length to positive

If a user has many snapshots, the length heuristic can go negative
and produce wrong indentation, so clamp it at 0.

Reported in the forum: https://forum.proxmox.com/threads/105740/

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

diff --git a/src/PVE/GuestHelpers.pm b/src/PVE/GuestHelpers.pm
index 970c460fe4bdda19abb120b3d1f9af508554e12b..0c8ed663b4d8919ed98138344b1127045e8e17c8 100644 (file)
--- a/src/PVE/GuestHelpers.pm
+++ b/src/PVE/GuestHelpers.pm
@@ -157,6 +157,7 @@ sub print_snapshot_tree {
        }
 
        my $len = 30 - length($prefix); # for aligning the description
+       $len = 0 if $len < 0;
        printf("%s %-${len}s %-23s %s\n", $prefix, $root, $timestring, $description);
 
        if ($e->{children}) {