[evolution] Cannot change organizer of existing meeting

[Milan Crha <mcrha src gnome org>]

commit 44a67c990593234806ff6b68e148159e0f6d7f61
Author: Milan Crha <mcrha redhat com>
Date:   Tue Sep 19 13:42:35 2017 +0200

    Cannot change organizer of existing meeting
    
    Users can change organizer both when the editor has opened a new meeting
    or when they are organizers.

 src/calendar/gui/e-comp-editor-page-general.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/calendar/gui/e-comp-editor-page-general.c b/src/calendar/gui/e-comp-editor-page-general.c
index 8d5b1b8..971acc8 100644
--- a/src/calendar/gui/e-comp-editor-page-general.c
+++ b/src/calendar/gui/e-comp-editor-page-general.c
@@ -936,7 +936,7 @@ ecep_general_fill_component (ECompEditorPage *page,
                comp_editor = e_comp_editor_page_ref_editor (page);
                flags = e_comp_editor_get_flags (comp_editor);
 
-               if ((flags & E_COMP_EDITOR_FLAG_IS_NEW) != 0 &&
+               if ((flags & (E_COMP_EDITOR_FLAG_IS_NEW | E_COMP_EDITOR_FLAG_ORGANIZER_IS_USER)) != 0 &&
                    !ecep_general_get_organizer (page_general, NULL, NULL)) {
                        e_comp_editor_set_validation_error (comp_editor, page,
                                page_general->priv->organizer_combo_box,
@@ -958,7 +958,7 @@ ecep_general_fill_component (ECompEditorPage *page,
                }
 
                /* Organizer */
-               if ((flags & E_COMP_EDITOR_FLAG_IS_NEW) != 0 &&
+               if ((flags & (E_COMP_EDITOR_FLAG_IS_NEW | E_COMP_EDITOR_FLAG_ORGANIZER_IS_USER)) != 0 &&
                    ecep_general_get_organizer (page_general, &organizer_name, &organizer_mailto)) {
                        const gchar *cal_email_address;
                        icalparameter *param;