[gmime] Fixed writing out a multipart's preface

[Jeffrey Stedfast <fejj src gnome org>]

commit 7d0dc1f62d710cd3ec486dfeba35f0d68ef6b93b
Author: Jeffrey Stedfast <jestedfa microsoft com>
Date:   Fri Feb 3 12:55:08 2017 -0500

    Fixed writing out a multipart's preface

 gmime/gmime-multipart.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gmime/gmime-multipart.c b/gmime/gmime-multipart.c
index 7a60f56..7c4a411 100644
--- a/gmime/gmime-multipart.c
+++ b/gmime/gmime-multipart.c
@@ -185,6 +185,11 @@ multipart_write_to_stream (GMimeObject *object, GMimeStream *stream, gboolean co
                        return -1;
                
                total += nwritten;
+               
+               if (g_mime_stream_write (stream, "\n", 1) == -1)
+                       return -1;
+               
+               total++;
        }
        
        for (i = 0; i < multipart->children->len; i++) {