Use black color for diamond end line style adorn images on Leopard, as it is supported now.
Use black color for diamond end line style adorn images on Leopard, as it is supported now.

git-svn-id: 765db44a9620ed55f4f8addfd3c14fe8cd57f6bb@3396 0fceea05-a30d-0410-8a8b-80ef821fb0a1

nanoant/Skim,nanoant/Skim,nanoant/Skim,nanoant/Skim,nanoant/Skim