Shading: Add object color to Object Info node.

The object color property is added as an additional output in
the Object Info node.

Reviewers: brecht

Differential Revision: https://developer.blender.org/D5554

source/blender/makesrna/intern/rna_object.c

@@ -2851,7 +2851,7 @@ static void rna_def_object(BlenderRNA *brna)
   prop = RNA_def_property(srna, "color", PROP_FLOAT, PROP_COLOR);
   RNA_def_property_ui_text(
       prop, "Color", "Object color and alpha, used when faces have the ObColor mode enabled");
-  RNA_def_property_update(prop, NC_OBJECT | ND_DRAW, NULL);
+  RNA_def_property_update(prop, NC_OBJECT | ND_DRAW, "rna_Object_internal_update_draw");
 
   /* physics */
   prop = RNA_def_property(srna, "field", PROP_POINTER, PROP_NONE);