3.4.9: regression dividing away units

[asottile]

Originally reported: sass/libsass-python#233

input.scss

$x: 5px;
$y: $x / 14px;

a {
    font-size: #{$y} rem;
}

Actual results

libsass 3.4.9

$ pysassc test.scss 
pysassc: error: Error: 0.35714 isn't a valid CSS value.
        on line 2 of test.scss
>> $y: $x / 14px;

   ----^

Expected result

ruby sass 3.4.21

a {
  font-size: 0.35714 rem;
}

version info:

$ pysassc --version
pysassc 0.13.7 (sass/libsass 3.4.9)

[asottile]

I haven't bisected this yet, but I suspect 93c81fe

CC @mgreter

[asottile]

@mgreter awesome, thanks for the quick fix :)