Merge pull request #3209 from tsl0922/master

Fix: API 500 error when project does not exists

lib/api/internal.rb

@@ -22,6 +22,7 @@ module Gitlab
         key = Key.find(params[:key_id])
         project = Project.find_with_namespace(project_path)
         git_cmd = params[:action]
+        return false unless project
         if key.is_deploy_key