www: avoid warnings on bad offsets for Xapian

The offset argument must be an integer for Xapian,
however users (or bots) type the darndest things.

AFAIK this has no security implications besides triggering
a warning (which could lead to out-of-space-errors)

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/PublicInbox/SearchView.pm b/lib/PublicInbox/SearchView.pm
index c0cd1ffd..e3dc22f7 100644
--- a/lib/PublicInbox/SearchView.pm
+++ b/lib/PublicInbox/SearchView.pm
@@ -263,10 +263,11 @@ use PublicInbox::Hval;
 sub new {
         my ($class, $cgi) = @_;
         my $r = $cgi->param('r');
+        my ($off) = (($cgi->param('o') || '0') =~ /(\d+)/);
         bless {
                 q => $cgi->param('q'),
                 x => $cgi->param('x') || '',
-                o => int($cgi->param('o') || 0) || 0,
+                o => $off,
                 r => (defined $r && $r ne '0'),
         }, $class;
 }