Public activity shows private repositories

[mrBliss]

• Gitea version (or commit ref): 1.0.1
• Git version: 2.7.4
• Operating system: Ubuntu 16.04.1
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes: https://try.gitea.io/publicActivity?tab=activity
  • No
  • Not relevant
• Log gist:

Description

After making a public repository private, its activity (creation of repo, pushed commits, etc.) is still visible in the Public Activity of the user. See https://try.gitea.io/publicActivity?tab=activity for an example. The links to the commits and repository all result in 404s, but anyone can still read the name of the private repository and the titles of the pushed commits.