[PATCH] force create() to fetch quoted attributes once

In ActiveRecord::Base, the private method create() first fetches quoted attributes with attributes_with_quotes. It then may build a custom SQL statement, where quoted_column_names() is called. This in turns triggers a second call to attributes_with_quotes() since it is used as the method's default parameter.

This single-line patch prevents from calling attributes_with_quotes() twice by supplying the fetched quoted attributes as the parameter when calling quoted_column_names(). I assumed standard rake tests are enough.

Note: this is my first patch proposal, feel free to tell me what may be wrong.