Individual column searching (select inputs) must not involve the first child of the row

kronikles

I have a table with a column check box for multi-selecting. But when I add Individual column searching (select inputs)
for filtering I encountered errors because of the column select its null.

How can I not involve the first child of the footer row.

          initComplete: function () {
                this.api().columns().every(function () {
                    var column = this;
                    var select = $('<select><option value=""></option></select>')
                        .appendTo($(column.footer()).empty())
                        .on('change', function () {
                            var val = $.fn.dataTable.util.escapeRegex(
                                $(this).val()
                            );

                            column
                                .search(val ? '^' + val + '$' : '', true, false)
                                .draw();
                        });

                    column.data().unique().sort().each(function (d, j) {
                        if (column.search() === '^' + d + '$') {
                            select.append('<option value="' + d + '" selected="selected">' + d + '</option>')
                        } else {
                            select.append('<option value="' + d + '">' + d + '</option>')
                        }
                    });
                });

this is the code i added of DataTable for Individual column searching (select inputs)