Center align jquery ui-icon inside td

I have such case, using gQGrid:

<td role="gridcell" style="text-align:center;" title="" aria-describedby="BaseBetsGrid1_approved">
<span class="ui-icon ui-icon-closethick"/>
</td>

How may i canter it?

i was trying to wrap it in to div and took wraptocenter class from here: http://www.brunildo.org/test/img_center.html

<style type="text/css">
.wraptocenter {
    display: table-cell;
    text-align: center;
    vertical-align: middle;
}
.wraptocenter * {
    vertical-align: middle;
}
/*\*//*/
.wraptocenter {
    display: block;
}
.wraptocenter span {
    display: inline-block;
    height: 100%;
    width: 1px;
}
/**/
</style>
<!--[if lt IE 8]><style>
.wraptocenter span {
    display: inline-block;
    height: 100%;
}
</style><![endif]-->

    <td role="gridcell" style="text-align:center;" title="" aria-describedby="BaseBetsGrid1_approved">
    <div class="wraptocenter">
    <span class="ui-icon ui-icon-closethick"/>
    </div>
</td>

But it is does not help.

How may i do that with minimum css styles?

may be specifying margin-left would be easier?