[geary/wip/778276-better-flag-updates: 1/25] Improve ImapDB.Folder debug logging for duplicate search field check.

[Michael Gratton <mjog src gnome org>]

commit 6c9ca79a1d258ffcb684b58be2f4e598cf963a6d
Author: Michael James Gratton <mike vee net>
Date:   Tue Dec 5 12:48:09 2017 +1100

    Improve ImapDB.Folder debug logging for duplicate search field check.

 src/engine/imap-db/imap-db-folder.vala |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/src/engine/imap-db/imap-db-folder.vala b/src/engine/imap-db/imap-db-folder.vala
index f863324..6a7fe5e 100644
--- a/src/engine/imap-db/imap-db-folder.vala
+++ b/src/engine/imap-db/imap-db-folder.vala
@@ -1217,8 +1217,11 @@ private class Geary.ImapDB.Folder : BaseObject, Geary.ReferenceSemantics {
         int64 id = -1;
         // if fields not present, then no duplicate can reliably be found
         if (!email.fields.is_all_set(REQUIRED_FIELDS)) {
-            debug("Unable to detect duplicates for %s (%s available)", email.id.to_string(),
-                email.fields.to_list_string());
+            debug("%s: Unable to detect duplicates for %s, fields available: %s",
+                  this.to_string(),
+                  email.id.to_string(),
+                  email.fields.to_list_string()
+            );
             return id;
         }