Fieldgroup data is lost when importing to module provided content type with group info for existing fields

Importing fields and groups to a content type which a module provides, eg webform etc, after this module has been deactivated and then activated again will result in the group data being lost. Since fieldgroup erases all group related data when the module providing the content type is disabeld, but cck does not remove the fields, content_copy wont try to restore the group data from the import. The patch provided moves a few lines of code around to make content_copy restore group data on the fields even though they exist from before.

Steps to reproduce
* Install drupal 6.10 with cck 2.1 (make sure to enable fieldgroup and content_copy) and webform 6.x-2.4
* Add a cck group to webform and put a field in the group
* Export the node type webform at admin/content/types/export
* Disable webform
* Enable webform
* Import what you exported into the node type webform
* Now both the field and the group you created exist, but the field is not in the group as desired, the group data has been lost.