Fix $breakpoint-no-queries so it works when $breakpoint-no-query-fallbacks is false

Here's a simple code sample that works in Breakpoint 1.3, but not in the latest 2.x branch:

```sass
@import breakpoint;

$breakpoint-no-queries: true;
$breakpoint-no-query-fallbacks: false;

#foo {
  background: red;
  @include breakpoint(567px, $no-query: true) {
    background: green;
  }
}
```

I would expect this output:
```sass
#foo {
  background: red;
  background: green;
}
```
But the green line doesn't get output in 2.x.x. You may recognize the example above; it's from the breakpoint-sass.com homepage. :-)

The work-around I had to use was to set $breakpoint-no-query-fallbacks to true, but that's not how 1.x worked and not how the docs say it should work.

This commit fixes that problem.