[evolution] Add e_mail_part_attachment_ref_attachment().

[Matthew Barnes <mbarnes src gnome org>]

commit 62daae00eb589b4ac430c2215b9b21627787825d
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sun May 19 09:54:53 2013 -0400

    Add e_mail_part_attachment_ref_attachment().

 em-format/e-mail-formatter-attachment.c |   12 ++++++------
 em-format/e-mail-formatter-print.c      |    2 +-
 em-format/e-mail-part-attachment.c      |    9 +++++++++
 em-format/e-mail-part-attachment.h      |    2 ++
 4 files changed, 18 insertions(+), 7 deletions(-)
---
diff --git a/em-format/e-mail-formatter-attachment.c b/em-format/e-mail-formatter-attachment.c
index b7df8aa..7718090 100644
--- a/em-format/e-mail-formatter-attachment.c
+++ b/em-format/e-mail-formatter-attachment.c
@@ -138,8 +138,8 @@ emfe_attachment_format (EMailFormatterExtension *extension,
                EAttachment *attachment;
                GList *head, *link;
 
-               attachment = g_object_ref (
-                       E_MAIL_PART_ATTACHMENT (part)->attachment);
+               attachment = e_mail_part_attachment_ref_attachment (
+                       E_MAIL_PART_ATTACHMENT (part));
 
                head = g_queue_peek_head_link (&part->validities);
 
@@ -201,8 +201,8 @@ emfe_attachment_format (EMailFormatterExtension *extension,
                        const gchar *description;
                        const gchar *display_name;
 
-                       attachment = g_object_ref (
-                               E_MAIL_PART_ATTACHMENT (part)->attachment);
+                       attachment = e_mail_part_attachment_ref_attachment (
+                               E_MAIL_PART_ATTACHMENT (part));
 
                        fi = e_attachment_get_file_info (attachment);
                        display_name = g_file_info_get_display_name (fi);
@@ -374,8 +374,8 @@ emfe_attachment_get_widget (EMailFormatterExtension *extension,
 
        g_return_val_if_fail (E_IS_MAIL_PART_ATTACHMENT (part), NULL);
 
-       attachment = g_object_ref (
-               E_MAIL_PART_ATTACHMENT (part)->attachment);
+       attachment = e_mail_part_attachment_ref_attachment (
+               E_MAIL_PART_ATTACHMENT (part));
 
        part_id = e_mail_part_get_id (part);
 
diff --git a/em-format/e-mail-formatter-print.c b/em-format/e-mail-formatter-print.c
index 70689df..a855ebc 100644
--- a/em-format/e-mail-formatter-print.c
+++ b/em-format/e-mail-formatter-print.c
@@ -62,7 +62,7 @@ mail_formatter_print_write_attachments (EMailFormatter *formatter,
                const gchar *display_name;
 
                part = g_queue_pop_head (attachments);
-               attachment = g_object_ref (part->attachment);
+               attachment = e_mail_part_attachment_ref_attachment (part);
 
                file_info = e_attachment_get_file_info (attachment);
                if (file_info == NULL) {
diff --git a/em-format/e-mail-part-attachment.c b/em-format/e-mail-part-attachment.c
index 2047f9d..ef19a81 100644
--- a/em-format/e-mail-part-attachment.c
+++ b/em-format/e-mail-part-attachment.c
@@ -28,3 +28,12 @@ e_mail_part_attachment_free (EMailPartAttachment *empa)
                empa->attachment_view_part_id = NULL;
        }
 }
+
+EAttachment *
+e_mail_part_attachment_ref_attachment (EMailPartAttachment *part)
+{
+       g_return_val_if_fail (part != NULL, NULL);
+
+       return g_object_ref (part->attachment);
+}
+
diff --git a/em-format/e-mail-part-attachment.h b/em-format/e-mail-part-attachment.h
index d44c599..24f0cf2 100644
--- a/em-format/e-mail-part-attachment.h
+++ b/em-format/e-mail-part-attachment.h
@@ -43,6 +43,8 @@ typedef struct _EMailPartAttachment {
 } EMailPartAttachment;
 
 void           e_mail_part_attachment_free     (EMailPartAttachment *empa);
+EAttachment *  e_mail_part_attachment_ref_attachment
+                                               (EMailPartAttachment *part);
 
 G_END_DECLS