Fix for category check
Fix for category check

since data structure looks like this:
```
array(3) {
  ["name"]=>
  string(10) "{}category"
  ["value"]=>
  string(15) "Foo bar"
  ["attributes"]=>
  array(2) {
    ["domain"]=>
    string(8) "category"
    ["nicename"]=>
    string(15) "foo-bar"
  }
}
```
you were checking on the wrong level and categories were imported into tags. After this small change, everything is imported as expected.
errant/Scupltor,errant/Sculptor,lury/Scupltor