allow to pass undefined value to template_replace

diff --git a/data/PVE/Tools.pm b/data/PVE/Tools.pm
index dc4bbfd33f7269739dfe5ff18fe99a9098acbbdc..85b32305e85c811885c4561e68e8507ad57d94b1 100644 (file)
--- a/data/PVE/Tools.pm
+++ b/data/PVE/Tools.pm
@@ -454,6 +454,8 @@ sub trim {
 sub template_replace {
     my ($tmpl, $data) = @_;
 
+    return $tmpl if !$tmpl;
+ 
     my $res = '';
     while ($tmpl =~ m/([^{]+)?({([^}]+)})?/g) {
        $res .= $1 if $1;