[evolution] Add e_mail_part_set_is_attachment().

[Matthew Barnes <mbarnes src gnome org>]

commit 42d1e89f02e6a50f4957a4d3b9cdc3f2b49c2852
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sun May 19 10:05:13 2013 -0400

    Add e_mail_part_set_is_attachment().

 em-format/e-mail-part.c                           |    9 +++++++++
 em-format/e-mail-part.h                           |    2 ++
 modules/prefer-plain/e-mail-parser-prefer-plain.c |    2 +-
 3 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/em-format/e-mail-part.c b/em-format/e-mail-part.c
index 6c1ee96..b7e4d67 100644
--- a/em-format/e-mail-part.c
+++ b/em-format/e-mail-part.c
@@ -275,6 +275,15 @@ e_mail_part_get_is_attachment (EMailPart *part)
        return part->is_attachment;
 }
 
+void
+e_mail_part_set_is_attachment (EMailPart *part,
+                               gboolean is_attachment)
+{
+       g_return_if_fail (part != NULL);
+
+       part->is_attachment = is_attachment;
+}
+
 static EMailPartValidityPair *
 mail_part_find_validity_pair (EMailPart *part,
                               guint32 validity_type)
diff --git a/em-format/e-mail-part.h b/em-format/e-mail-part.h
index e4a8375..19e62ac 100644
--- a/em-format/e-mail-part.h
+++ b/em-format/e-mail-part.h
@@ -110,6 +110,8 @@ const gchar *       e_mail_part_get_mime_type       (EMailPart *part);
 void           e_mail_part_set_mime_type       (EMailPart *part,
                                                 const gchar *mime_type);
 gboolean       e_mail_part_get_is_attachment   (EMailPart *part);
+void           e_mail_part_set_is_attachment   (EMailPart *part,
+                                                gboolean is_attachment);
 void           e_mail_part_update_validity     (EMailPart *part,
                                                 CamelCipherValidity *validity,
                                                 guint32 validity_type);
diff --git a/modules/prefer-plain/e-mail-parser-prefer-plain.c 
b/modules/prefer-plain/e-mail-parser-prefer-plain.c
index 32605dd..f142b8b 100644
--- a/modules/prefer-plain/e-mail-parser-prefer-plain.c
+++ b/modules/prefer-plain/e-mail-parser-prefer-plain.c
@@ -323,7 +323,7 @@ empe_prefer_plain_parse (EMailParserExtension *extension,
                        mime_type = e_mail_part_get_mime_type (mpart);
 
                        if (mpart && mpart->is_hidden && g_strcmp0 (mime_type, "text/html") == 0) {
-                               mpart->is_attachment = TRUE;
+                               e_mail_part_set_is_attachment (mpart, TRUE);
                        }
                }
        }