Bug fix #34334

For 2.66a 

Soft shadow was drawing a complete rect, but it should skip the top edge.
That allows transparent menus to still have a shadow too.



git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@54954 954f8c5b-7b00-dc11-b283-0030488c597c