From 3bb58be2b57464a6520c0b97fb8c5579e413d002 Mon Sep 17 00:00:00 2001
From: "B. Petersen" <r10s@b44t.com>
Date: Wed, 11 Dec 2019 03:07:32 +0100
Subject: [PATCH] add missing delete header

---
 src/mimefactory.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mimefactory.rs b/src/mimefactory.rs
index 91641bc78..c7b8a2d1b 100644
--- a/src/mimefactory.rs
+++ b/src/mimefactory.rs
@@ -693,6 +693,12 @@ impl<'a, 'b> MimeFactory<'a, 'b> {
                         "Chat-Content".to_string(),
                         "group-avatar-changed".to_string(),
                     ));
+                    if grpimage.is_none() {
+                        protected_headers.push(Header::new(
+                            "Chat-Group-Avatar".to_string(),
+                            "0".to_string(),
+                        ));
+                    }
                     add_compatibility_header = true;
                 }
                 _ => {}