display empty tags when use "group multiple"

to reproduce,

1.turn cck, views, and any field that can use "multiple values" (i use imagesfield)
2.add a "multiple value" filed to a content type
3.submit a node without anything on the new field
4.create a view(i use block list), display the new field

the block will have some <div class="field-item"></div>

which should not be themed.

the error is from:
content_views.inc
function theme_content_view_multiple_field()

just add a if after the foreach loop