404 on Organization's repo

[the-holger]

• Gitea version (or commit ref): 1.3.1
• Git version: 2.7.4
• Operating system: Ubuntu 16.04
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:
  gitea.log for error in webview: https://gist.github.com/the-holger/ef9c4668606190eb6e3820db7293d066
  serv.log for error when trying to push: https://gist.github.com/the-holger/6af2b64a6ab7370367ee799cc76a4d8f

Description

I created (multiple) repos for an organization using user "holger". Now at least one of the repos won't let user "holger" (admin user, owner of the organization) push commits, trying to view it in the browser gives me a 404.

This is fixed by this, adapted to the new DB structure

[lafriks]

Duplicate of #1794