Variables in alpha-filter not replaced

[cundd]

We use the following mixin:

//
// Opacity
// Make the Bootstrap version of the opacity mixin more consistent with the
// original CSS property, which is defined in values from 0 to 1
@mixin opacity($opacity) {
  // If the given opacity is smaller than 1, it is used directly, otherwise
  // the value will be devided by 100
  @if ($opacity < 1) {
    opacity: $opacity;
    filter: alpha(opacity=$opacity * 100);
  } @else {
    opacity: $opacity / 100;
    filter: alpha(opacity=$opacity);
  }
}

Unfortunately the opacity variable in filter: alpha(opacity=$opacity); will not get replaced.

[leafo]

This should be fixed now, thanks for the report.