Invalid meta.last on empty items

[lcarva]

If there are no builds, the last attribute of meta points to an invalid URL:

🐚  curl http://localhost:8080/api/v1/builds
{
  "items": [], 
  "meta": {
    "first": "http://localhost:8080/api/v1/builds?page=1&per_page=20", 
    "last": "http://localhost:8080/api/v1/builds?page=0&per_page=20", 
    "next": null, 
    "page": 1, 
    "pages": 0, 
    "per_page": 20, 
    "previous": null, 
    "total": 0
  }
}

🐚  curl 'http://localhost:8080/api/v1/builds?page=0&per_page=20"'
{
  "error": "The requested resource was not found"
}

meta.last should have the same value as meta.first if there are not builds.