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

[Milan Crha <mcrha src gnome org>]

commit 93a9c538ff82f7036126a989cd4a8e2b215beed5
Author: Milan Crha <mcrha redhat com>
Date:   Tue Dec 13 12:37:07 2016 +0100

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

 src/configuration/e-mapi-edit-folder-permissions.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/src/configuration/e-mapi-edit-folder-permissions.c 
b/src/configuration/e-mapi-edit-folder-permissions.c
index 33e6941..e88f13b 100644
--- a/src/configuration/e-mapi-edit-folder-permissions.c
+++ b/src/configuration/e-mapi-edit-folder-permissions.c
@@ -543,9 +543,13 @@ update_permission_dialog_by_level_combo (GObject *dialog)
        if (ii < 0 || ii >= G_N_ELEMENTS (predefined_levels) - 1)
                return;
 
-       rights = folder_permissions_dialog_to_rights (dialog);
-       rights = predefined_levels[ii].rights | (rights & (E_MAPI_PERMISSION_BIT_FREE_BUSY_DETAILED |
-               E_MAPI_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_MAPI_PERMISSION_BIT_FREE_BUSY_DETAILED |
+                       E_MAPI_PERMISSION_BIT_FREE_BUSY_SIMPLE));
+       }
 
        widgets->updating = TRUE;
        update_folder_permissions_by_rights (dialog, rights);