提交issue关闭错误问题

Signed-off-by: zouap <zouap@pcl.ac.cn>

models/issue.go

@@ -851,7 +851,7 @@ func (issue *Issue) GetCloseUser() (*User, error) {
 		return nil, nil
 	}
 	err = c.LoadPoster()
-	if err == nil {
+	if c.Poster != nil {
 		return c.Poster, nil
 	}
 	if issue.Poster == nil {