[gnome-todo] task-list: don't leak GdkRGBA color

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 0a267397129f1231c86e67573b252b420aa5e48f
Author: Victor Toso <me victortoso com>
Date:   Thu Sep 29 22:17:58 2016 +0200

    task-list: don't leak GdkRGBA color
    
    192 bytes in 6 blocks are definitely lost in loss record 15,388 of 16,885
       at 0x4C2DB9D: malloc (vg_replace_malloc.c:299)
       by 0xA1F890E: g_malloc (gmem.c:94)
       by 0xA212A55: g_slice_alloc (gslice.c:1025)
       by 0xA212AD7: g_slice_copy (gslice.c:1076)
       by 0x678E912: gdk_rgba_copy (gdkrgba.c:76)
       by 0x423910: gtd_task_list_get_color (gtd-task-list.c:306)
       by 0x4233DD: gtd_task_list_get_property (gtd-task-list.c:83)
       by 0x9D5717E: object_get_property (gobject.c:1378)
       by 0x9D59E7F: g_object_get_property (gobject.c:2446)
       by 0x9D49E90: on_source_notify (gbinding.c:316)
       by 0x9D53F16: g_cclosure_marshal_VOID__PARAM (gmarshal.c:1832)
       by 0x9D4F8B9: g_closure_invoke (gclosure.c:804)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772212

 src/gtd-task-list.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/src/gtd-task-list.c b/src/gtd-task-list.c
index 5fee618..976af8c 100644
--- a/src/gtd-task-list.c
+++ b/src/gtd-task-list.c
@@ -80,8 +80,12 @@ gtd_task_list_get_property (GObject    *object,
   switch (prop_id)
     {
     case PROP_COLOR:
-      g_value_set_boxed (value, gtd_task_list_get_color (self));
-      break;
+      {
+        GdkRGBA *color = gtd_task_list_get_color (self);
+        g_value_set_boxed (value, color);
+        gdk_rgba_free (color);
+        break;
+      }
 
     case PROP_IS_REMOVABLE:
       g_value_set_boolean (value, gtd_task_list_is_removable (self));