points calculated wrong in DataTables cell

[gypapp]

Hi, I have run into a weird situation when using peity with DataTables DataTables is used to display traffic-related information in tabular format and I'd like to add a small bar or line graph to every row with peity:

            $('#sources').DataTable( {
                /* ... */
                "columnDefs": [
                    {
                        "targets": 5,
                        "data": "volume",
                        "render": function ( data ) {
                            return '<span class="bar-trend">'+ data.trend +'</span>';
                        }
                    }
                ],
                "createdRow": function ( row, data, index ) {
                    $('span.bar-trend', row).peity("line");
                }

Though the svg is generated the points are obviously miscalculated for this sequence 41,48,49,47,74,64,71,47:

<svg class="peity" height="16" width="32"><polygon fill="#c6d9fd" points="0 -0.5 0 0.05405405405405406 0 0.14864864864864868 0 0.16216216216216217 0 0.1351351351351351 0 0.5 0 0.3648648648648649 0 0.45945945945945943 0 0.1351351351351351 0 -0.5"></polygon><polyline fill="none" points="0 0.05405405405405406 0 0.14864864864864868 0 0.16216216216216217 0 0.1351351351351351 0 0.5 0 0.3648648648648649 0 0.45945945945945943 0 0.1351351351351351" stroke="#4d89f9" stroke-width="1" stroke-linecap="square"></polyline></svg>

If I put it elsewhere statically in the HTML, it shows up correctly. points in this case:
0 15.5 0 7.1891891891891895 4.571428571428571 5.77027027027027 9.142857142857142 5.567567567567567 13.714285714285714 5.972972972972974 18.285714285714285 0.5 22.857142857142854 2.5270270270270263 27.428571428571427 1.1081081081081088 32 5.972972972972974 32 15.5

Please advise how I could fix it.

[gypapp]

I traced down in Chrome and found both $svg.width() and $svg.height() return 0 in this case:

      var $svg = this.prepare(opts.width, opts.height)
        , width = $svg.width()
        , height = $svg.height()

This is somewhat similar to #68

[gypapp]

Duplicate of #68