Dont generate migration when doing scaffolding

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3775 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

railties/lib/rails_generator/generators/components/scaffold/scaffold_generator.rb

@@ -73,7 +73,7 @@ def manifest
       m.directory File.join('test/functional', controller_class_path)
 
       # Depend on model generator but skip if the model exists.
-      m.dependency 'model', [singular_name], :collision => :skip
+      m.dependency 'model', [singular_name], :collision => :skip, :skip_migration => true
 
       # Scaffolded forms.
       m.complex_template "form.rhtml",