remove closure

Co-authored-by: @Jikstra

src/chat.rs

@@ -1653,13 +1653,16 @@ pub unsafe fn set_chat_profile_image(
 ) -> Result<(), Error> {
     ensure!(chat_id > DC_CHAT_ID_LAST_SPECIAL, "Invalid chat ID");
 
-    let mut success = false;
-
     let mut chat = Chat::load_from_db(context, chat_id)?;
     let mut msg = dc_msg_new_untyped(context);
-    let mut new_image_rel = None;
+    let new_image_rel;
+
+    macro_rules! returnError{
+        () => {
+            bail!("Failed to set profile image");
+        };
+    }
 
-    (|| {
     if real_group_exists(context, chat_id) {
         if !(is_contact_in_chat(context, chat_id, 1i32 as u32) == 1i32) {
             log_event!(
@@ -1669,12 +1672,12 @@ pub unsafe fn set_chat_profile_image(
                 "Cannot set chat profile image; self not in group.",
             );
             /* we should respect this - whatever we send to the group, it gets discarded anyway! */
-                return;
+            returnError!();
         }
         if !new_image.as_ref().is_empty() {
             let mut img = new_image.as_ref().to_string();
             if !dc_make_rel_and_copy(context, &mut img) {
-                    return;
+                returnError!();
             }
             new_image_rel = Some(img);
         } else {
@@ -1713,16 +1716,10 @@ pub unsafe fn set_chat_profile_image(
                 chat_id as uintptr_t,
                 0i32 as uintptr_t,
             );
-                success = true;
+            return Ok(());
         }
     }
-    })();
-
-    if !success {
-        bail!("Failed to set profile image");
-    }
-
-    Ok(())
+    returnError!()
 }
 
 pub unsafe fn forward_msgs(