[gimp/metadata-browser] app: plug a memory leak

[Roman Joost <romanofski src gnome org>]

commit b8350bad6a2ec4c898fc184fd06a1a3d44c39efa
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Sat Jul 7 18:47:02 2012 +0200

    app: plug a memory leak
    
    ==7785== 96 bytes in 4 blocks are definitely lost in loss record 16,947 of 20,720
    ==7785==    at 0x4A0884D: malloc (/builddir/build/BUILD/valgrind-3.7.0/coregrind/m_replacemalloc/vg_replace_malloc.c:263)
    ==7785==    by 0x87F52DE: g_malloc (glib/glib/gmem.c:159)
    ==7785==    by 0x8809741: g_slice_alloc (glib/glib/gslice.c:1003)
    ==7785==    by 0x87EBF0D: g_list_prepend (glib/glib/glist.c:275)
    ==7785==    by 0x6FA596: gimp_item_stack_get_item_list (gimp/app/core/gimpitemstack.c:175)
    ==7785==    by 0x6D97B4: gimp_image_convert_precision (gimp/app/core/gimpimage-convert-precision.c:55)
    ==7785==    by 0x49B62E: image_convert_precision_cmd_callback (gimp/app/actions/image-commands.c:236)

 app/core/gimpimage-convert-precision.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpimage-convert-precision.c b/app/core/gimpimage-convert-precision.c
index 26162a8..7243ffd 100644
--- a/app/core/gimpimage-convert-precision.c
+++ b/app/core/gimpimage-convert-precision.c
@@ -108,6 +108,7 @@ gimp_image_convert_precision (GimpImage     *image,
         gimp_progress_set_value (progress,
                                  (gdouble) nth_drawable / (gdouble) n_drawables);
     }
+  g_list_free (all_drawables);
 
   /*  convert the selection mask  */
   {