wxGUI: define addrnum silk icon

(merge from devbr6, https://trac.osgeo.org/grass/changeset/33750)


git-svn-id: https://svn.osgeo.org/grass/grass/trunk@33751 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/icons/silk/__init__.py

@@ -67,6 +67,7 @@ IconsSilk = {
     "addrast3d"  : 'bricks.png',
     "addshaded"  : 'picture_empty.png',
     "addrarrow"  : 'arrow_inout.png',
+    "addrnum"    : 'color_swatch.png',
     "addvect"    : 'map_add.png',
     "addcmd"     : 'cog_add.png',
     "addgrp"     : 'folder_add.png',