[geary/wip/email-flag-refinement: 6/6] Throw the correct error when email id is not valid for create_or_merge

[Michael Gratton <mjog src gnome org>]

commit 7c05f5d3907aea29de0c7c0e5bca8d0c0c28e333
Author: Michael Gratton <mike vee net>
Date:   Wed Feb 13 18:48:24 2019 +1100

    Throw the correct error when email id is not valid for create_or_merge

 src/engine/imap-db/imap-db-folder.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/engine/imap-db/imap-db-folder.vala b/src/engine/imap-db/imap-db-folder.vala
index 591fcc00..904fead9 100644
--- a/src/engine/imap-db/imap-db-folder.vala
+++ b/src/engine/imap-db/imap-db-folder.vala
@@ -1360,7 +1360,7 @@ private class Geary.ImapDB.Folder : BaseObject, Geary.ReferenceSemantics {
         if (email_id == null ||
             email_id.message_id != Db.INVALID_ROWID ||
             email_id.uid == null) {
-            throw new EngineError.INCOMPLETE_MESSAGE(
+            throw new EngineError.BAD_PARAMETERS(
                 "IMAP message with UID required"
             );
         }