Do not send notification emails to inactive users (#19131)

Emails should not be sent to inactive users except for Activate and ResetPassword
messages.

Fix #18950

Signed-off-by: Andrew Thornton <art27@cantab.net>

services/mailer/mail_repo.go

@@ -31,6 +31,10 @@ func SendRepoTransferNotifyMail(doer, newOwner *user_model.User, repo *repo_mode
 
 		langMap := make(map[string][]string)
 		for _, user := range users {
+			if !user.IsActive {
+				// don't send emails to inactive users
+				continue
+			}
 			langMap[user.Language] = append(langMap[user.Language], user.Email)
 		}