only process thumbnails if process_attachment_with_processing is defined
only process thumbnails if process_attachment_with_processing is defined

git-svn-id: ba00f29dd6b2951adb15cd479ecfe583dcefd73b@2603 567b1171-46fb-0310-a4c9-b4bef9110e78

exact/attachment_fu,pothoven/attachment_fu,yunanhelmy/attachment_fu,noosfero/attachment_fu,tricycle/attachment_fu,alanjrogers/attachment_fu,technoweenie/attachment_fu,jmoses/attachment_fu,jcoyne/attachment_fu