X-Git-Url: https://git.p6c8.net/selfforum.git/blobdiff_plain/e4453d784ec8903820ff2e03c29545b13060f060..c80b6ed9be80ba3a63256be3a0ae79664bbe6b59:/selfforum-cgi/shared/Id.pm

diff --git a/selfforum-cgi/shared/Id.pm b/selfforum-cgi/shared/Id.pm
index 22535a2..8e91379 100644
--- a/selfforum-cgi/shared/Id.pm
+++ b/selfforum-cgi/shared/Id.pm
@@ -66,6 +66,8 @@ sub unique_id () {
 #
 sub to_base64 ($) {
   my $x = shift;
+  return '' unless defined $x;
+
   my $y = $table[$x % 64];
 
   $y = $table[$x % 64].$y while ($x = int ($x/64));