[gmime/gmime-2-4] Fixed a crash in group_to_string()

[Jeffrey Stedfast <fejj src gnome org>]

commit 5048300d233c5dda53091031bcb04f9e3c8a95fa
Author: Jeffrey Stedfast <fejj gnome org>
Date:   Thu Sep 2 10:00:10 2010 -0400

    Fixed a crash in group_to_string()
    
    2010-09-02  Jeffrey Stedfast  <fejj novell com>
    
    	* gmime/internet-address.c (group_to_string): Don't crash if the
    	group name is unset. Thanks to Damian Pietras for this patch.

 ChangeLog                |    5 +++++
 gmime/internet-address.c |   21 ++++++++++++---------
 2 files changed, 17 insertions(+), 9 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 9253f26..5cbbd2d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-09-02  Jeffrey Stedfast  <fejj novell com>
+
+	* gmime/internet-address.c (group_to_string): Don't crash if the
+	group name is unset. Thanks to Damian Pietras for this patch.
+
 2010-09-01  Jeffrey Stedfast  <fejj novell com>
 
 	* gmime/gmime-utils.c (g_mime_utils_header_decode_phrase):
diff --git a/gmime/internet-address.c b/gmime/internet-address.c
index 2c80b67..fc3da9f 100644
--- a/gmime/internet-address.c
+++ b/gmime/internet-address.c
@@ -1269,18 +1269,21 @@ group_to_string (InternetAddress *ia, guint32 flags, size_t *linelen, GString *s
 	InternetAddressGroup *group = (InternetAddressGroup *) ia;
 	gboolean encode = flags & INTERNET_ADDRESS_ENCODE;
 	gboolean fold = flags & INTERNET_ADDRESS_FOLD;
-	char *name;
-	size_t len;
-	
-	name = encoded_name (ia->name, encode);
-	len = strlen (name);
+	char *name = NULL;
+	size_t len = 0;
 	
-	if (fold && *linelen > 1 && (*linelen + len + 1) > GMIME_FOLD_LEN) {
-		linewrap (string);
-		*linelen = 1;
+	if (ia->name != NULL) {
+		name = encoded_name (ia->name, encode);
+		len = strlen (name);
+		
+		if (fold && *linelen > 1 && (*linelen + len + 1) > GMIME_FOLD_LEN) {
+			linewrap (string);
+			*linelen = 1;
+		}
+		
+		g_string_append_len (string, name, len);
 	}
 	
-	g_string_append_len (string, name, len);
 	g_string_append_len (string, ": ", 2);
 	*linelen += len + 2;
 	g_free (name);