fix scaling of bar graph y axis

    $(document).ready(function () {

        // need to get worst case of enc + dec combined, because values are stacked in the graph

        var max = get_max_y_val_for_plotting(Graphs_WMOPS.wmops_worstcase.displays, 50);

        var displays = Graphs_WMOPS_perOP.wmops_worstcase_per_op.displays;

        var encData, decData;

        if (displays.length == 2) {

            encData = [displays[0]];

            decData = [displays[1]];

        }

        else if (displays.length == 4) {

            encData = [displays[0], displays[2]];

            decData = [displays[1], displays[3]];

        }

        var max_enc = get_max_y_val_for_plotting(encData, 1);

        var max_dec = get_max_y_val_for_plotting(decData, 1);

        var max = Math.ceil( (max_enc + max_dec ) / 50) * 50;

        drawGraph($("#wmops_per_op-graph"), Graphs_WMOPS_perOP.wmops_worstcase_per_op, max);

    });