patch [#25440] Object.vertex_group fixin'

from Dan Eicher (dna) 

 From the tracker (with minor edits)
========================

cube = bpy.data.objects['Cube']
foo = cube.vertex_groups.new('foo')
foo.add([1,3,5,7], 1.0, 'ADD')

for i in range(len(cube.data.vertices)):
    try:
        weight = foo.weight(i)
        print('vert: %i weight: %f' % (i, weight))
    except:
        pass

foo.remove([1,3])

cube.vertex_groups.remove(foo)

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_mesh.h b/source/blender/editors/include/ED_mesh.h
index d1bce26dd45..386bbc0a236 100644
--- a/source/blender/editors/include/ED_mesh.h
+++ b/source/blender/editors/include/ED_mesh.h
@@ -193,12 +193,15 @@ int paintface_minmax(struct Object *ob, float *min, float *max);
 
 struct bDeformGroup		*ED_vgroup_add(struct Object *ob);
 struct bDeformGroup		*ED_vgroup_add_name(struct Object *ob, const char *name);
+void 					ED_vgroup_delete(struct Object *ob, struct bDeformGroup *defgroup);
 void					ED_vgroup_select_by_name(struct Object *ob, char *name);
 void					ED_vgroup_data_create(struct ID *id);
 int						ED_vgroup_give_array(struct ID *id, struct MDeformVert **dvert_arr, int *dvert_tot);
 int						ED_vgroup_copy_array(struct Object *ob, struct Object *ob_from);
 void					ED_vgroup_mirror(struct Object *ob, int mirror_weights, int flip_vgroups);
 
+int						ED_vgroup_object_is_edit_mode(struct Object *ob);
+
 void		ED_vgroup_vert_add(struct Object *ob, struct bDeformGroup *dg, int vertnum,  float weight, int assignmode);
 void		ED_vgroup_vert_remove(struct Object *ob, struct bDeformGroup *dg, int vertnum);
 float		ED_vgroup_vert_weight(struct Object *ob, struct bDeformGroup *dg, int vertnum);