[evolution-ews] Bug 775951 - Folder permission level change doesn't change read permission

[Milan Crha <mcrha src gnome org>]

commit efe8f14f63062a155312dd34a445e73bcc509111
Author: Milan Crha <mcrha redhat com>
Date:   Tue Dec 13 12:32:49 2016 +0100

    Bug 775951 - Folder permission level change doesn't change read permission

 src/configuration/e-ews-edit-folder-permissions.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/src/configuration/e-ews-edit-folder-permissions.c 
b/src/configuration/e-ews-edit-folder-permissions.c
index 6247678..cbd847c 100644
--- a/src/configuration/e-ews-edit-folder-permissions.c
+++ b/src/configuration/e-ews-edit-folder-permissions.c
@@ -526,9 +526,13 @@ update_permission_dialog_by_level_combo (GObject *dialog)
            (!widgets->read_fb_time_radio && ii >= G_N_ELEMENTS (predefined_levels) - 3))
                return;
 
-       rights = folder_permissions_dialog_to_rights (dialog);
-       rights = predefined_levels[ii].rights | (rights & (E_EWS_PERMISSION_BIT_FREE_BUSY_DETAILED |
-               E_EWS_PERMISSION_BIT_FREE_BUSY_SIMPLE));
+       if (!predefined_levels[ii].rights) {
+               rights = predefined_levels[ii].rights;
+       } else {
+               rights = folder_permissions_dialog_to_rights (dialog);
+               rights = predefined_levels[ii].rights | (rights & (E_EWS_PERMISSION_BIT_FREE_BUSY_DETAILED |
+                       E_EWS_PERMISSION_BIT_FREE_BUSY_SIMPLE));
+       }
 
        widgets->updating++;
        update_folder_permissions_by_rights (dialog, rights);