Rem mixin broken

[getdave]

the rem() mixin needs to be updated here

to be

// REMs - the ultimate REM mixin
@mixin rem($property, $values) {
  $px : (); /* 3 */
  $rem: (); /* 3 */

  @each $value in $values { /* 4 */

    @if $value == 0 or $value == auto { /* 5 */
      $px : append($px , $value);
      $rem: append($rem, $value);
    }

    @else {
      $unit: unit($value);    /* 6 */
      $val: parseInt($value); /* 6 */

      @if $unit == "px" {  /* 7 */
        $px : append($px,  $value);
        $rem: append($rem, ($val / 16 + rem));
      }

      @if $unit == "rem" { /* 7 */
        $px : append($px,  ($val * 16 + px));
        $rem: append($rem, $value);
      }
    }
  }

  @if $px == $rem {     /* 8 */
    #{$property}: $px;  /* 9 */
  } @else {
    #{$property}: $px;  /* 9 */
    #{$property}: $rem; /* 9 */
  }
}