Compare against base repo to avoid mismatch when merging from fork

Signed-off-by: Elias Norberg <elias@aisle.se>

models/pull.go

@@ -339,14 +339,17 @@ func (pr *PullRequest) GetLastCommitStatus() (status *CommitStatus, err error) {
 		return nil, err
 	}
 
-	repo := pr.HeadRepo
 	lastCommitID, err := headGitRepo.GetBranchCommitID(pr.HeadBranch)
 	if err != nil {
 		return nil, err
 	}
 
-	var statusList []*CommitStatus
-	statusList, err = GetLatestCommitStatus(repo, lastCommitID, 0)
+	err = pr.GetBaseRepo()
+	if err != nil {
+		return nil, err
+	}
+
+	statusList, err := GetLatestCommitStatus(pr.BaseRepo, lastCommitID, 0)
 	if err != nil {
 		return nil, err
 	}