[evolution] Bug 790311 - Print of message attachment shows main message headers

[Milan Crha <mcrha src gnome org>]

commit 4c977fe77ec90e555e05d6bdc64ef059a51e61bd
Author: Milan Crha <mcrha redhat com>
Date:   Mon Nov 27 19:14:58 2017 +0100

    Bug 790311 - Print of message attachment shows main message headers

 src/em-format/e-mail-part-headers.c |   15 ++++-----------
 1 files changed, 4 insertions(+), 11 deletions(-)
---
diff --git a/src/em-format/e-mail-part-headers.c b/src/em-format/e-mail-part-headers.c
index c509040..7f5a9b2 100644
--- a/src/em-format/e-mail-part-headers.c
+++ b/src/em-format/e-mail-part-headers.c
@@ -59,26 +59,19 @@ static GtkTreeModel *
 mail_part_headers_build_print_model (EMailPartHeaders *part)
 {
        GtkListStore *list_store;
-       EMailPartList *part_list;
-       CamelMimeMessage *message;
+       CamelMimePart *mime_part;
        const CamelNameValueArray *headers;
        gint default_position = 0;
        guint ii, length = 0;
 
-       /* If the part list is NULL, it means the function was called
-        * too early.  The part must be added to a part list first so
-        * we have access to the CamelMimeMessage. */
-       part_list = e_mail_part_ref_part_list (E_MAIL_PART (part));
-       g_return_val_if_fail (part_list != NULL, NULL);
-
        list_store = gtk_list_store_new (
                E_MAIL_PART_HEADERS_PRINT_MODEL_NUM_COLUMNS,
                G_TYPE_BOOLEAN,  /* INCLUDE */
                G_TYPE_STRING,   /* HEADER_NAME */
                G_TYPE_STRING);  /* HEADER_VALUE */
 
-       message = e_mail_part_list_get_message (part_list);
-       headers = camel_medium_get_headers (CAMEL_MEDIUM (message));
+       mime_part = e_mail_part_ref_mime_part (E_MAIL_PART (part));
+       headers = camel_medium_get_headers (CAMEL_MEDIUM (mime_part));
        length = camel_name_value_array_get_length (headers);
 
        for (ii = 0; ii < length; ii++) {
@@ -124,7 +117,7 @@ mail_part_headers_build_print_model (EMailPartHeaders *part)
                        -1);
        }
 
-       g_object_unref (part_list);
+       g_object_unref (mime_part);
 
        /* Stash the print model internally. */