[evolution-ews] Add EWS_FOLDER_TYPE_UNKNOWN.

[Matthew Barnes <mbarnes src gnome org>]

commit b4e66d8a720fd97314f46b668155320315b11fe2
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri Aug 3 10:01:16 2012 -0400

    Add EWS_FOLDER_TYPE_UNKNOWN.
    
    It's useful to have an explicitly invalid enum value.

 src/server/e-ews-folder.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/server/e-ews-folder.h b/src/server/e-ews-folder.h
index a70c5fa..504a250 100644
--- a/src/server/e-ews-folder.h
+++ b/src/server/e-ews-folder.h
@@ -46,6 +46,7 @@ struct _EEwsFolderClass {
 };
 
 typedef enum {
+	EWS_FOLDER_TYPE_UNKNOWN,
 	EWS_FOLDER_TYPE_MAILBOX,
 	EWS_FOLDER_TYPE_CALENDAR,
 	EWS_FOLDER_TYPE_CONTACTS,