* LDV::Filebin->save : fix mistype

lib/LDV/Filebin.pm

@@ -103,7 +103,7 @@ sub save {
       # make thumb
       my ($th_w, $th_h) = ($conf->{thumbs_size} =~ m/(\d+)x(\d+)/oi);
       my $thumb = $image->scale(xpixels => $th_w, ypixels => $th_h, type => 'min');
-      my $path = $self->_file_path("${time}_th", $conf->{thumbs_ext}, 'fullpath');
+      my $path = $self->_file_path("${time}_tn", $conf->{thumbs_ext}, 'fullpath');
       $thumb->write(file => $path)
         or die $thumb->errstr;
     } elsif ($file->{fmime} =~ m{^video/}o) {