[gmime] Fixed a bug in multipart insertion

[Jeffrey Stedfast <fejj src gnome org>]

commit 2a22ae0b15d21fc8b004aba5637a8651d37a4c15
Author: Jeffrey Stedfast <fejj gnome org>
Date:   Thu Nov 5 11:11:19 2009 -0500

    Fixed a bug in multipart insertion
    
    2009-11-05  Jeffrey Stedfast  <fejj novell com>
    
    	* gmime/gmime-multipart.c (ptr_array_insert): Fixed to handle an
    	index larger than the current array length as well as fixing the
    	true insert case to shift items when index is les than the current
    	array length (as opposed to when it is equal-to). Thanks to
    	harven gingers rulez pl for finding this bug.

 ChangeLog               |    8 ++++++++
 gmime/gmime-multipart.c |   14 ++++++++------
 2 files changed, 16 insertions(+), 6 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index fcde714..c53bd6d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-11-05  Jeffrey Stedfast  <fejj novell com>
+
+	* gmime/gmime-multipart.c (ptr_array_insert): Fixed to handle an
+	index larger than the current array length as well as fixing the
+	true insert case to shift items when index is les than the current
+	array length (as opposed to when it is equal-to). Thanks to
+	harven gingers rulez pl for finding this bug.
+
 2009-10-10  Jeffrey Stedfast  <fejj novell com>
 
 	* gmime/gmime-utils.c: Fixed the military timezone offsets.
diff --git a/gmime/gmime-multipart.c b/gmime/gmime-multipart.c
index dae0e33..b66ba4c 100644
--- a/gmime/gmime-multipart.c
+++ b/gmime/gmime-multipart.c
@@ -495,18 +495,20 @@ ptr_array_insert (GPtrArray *array, guint index, gpointer object)
 	unsigned char *dest, *src;
 	guint n;
 	
-	g_ptr_array_set_size (array, array->len + 1);
-	
-	if (index == array->len) {
-		/* need to move items down */
+	if (index < array->len) {
+		/* need to shift some items */
+		g_ptr_array_set_size (array, array->len + 1);
+		
 		dest = ((unsigned char *) array->pdata) + (sizeof (void *) * (index + 1));
 		src = ((unsigned char *) array->pdata) + (sizeof (void *) * index);
 		n = array->len - index - 1;
 		
 		g_memmove (dest, src, (sizeof (void *) * n));
+		array->pdata[index] = object;
+	} else {
+		/* the easy case */
+		g_ptr_array_add (array, object);
 	}
-	
-	array->pdata[index] = object;
 }
 
 static void