Bad roundoff data when adjusting resolution

in function _chart_adjust_resolution($chart_id, &$data, $max_value = NULL) counts $divider and $multiplier values, that rounds to 0.0 accuracy:

    if ($max[$chart_id] > $resoluton){
      $divider = round($max[$chart_id] / $resoluton, 1);
    }
    else {
      $multiplier = round($resoluton / $max[$chart_id], 1);
    }

But when I use different values, very often chart never got 100 and 99 values for maxumum data peaks!

I think we must remove rounding of $divider and $multiplier values.

If I change this code to

    if ($max[$chart_id] > $resoluton){
      $divider = $max[$chart_id] / $resoluton;
    }
    else {
      $multiplier = $resoluton / $max[$chart_id];
    }

my charts looks better and more precisely.