Fix #33752: UV Orco coordinates were wrong for Cycles (and other external
render engines). Replaced generating orco_index by filling the UV loop data
directly which is easier and all that needed to be done anyway.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53711 954f8c5b-7b00-dc11-b283-0030488c597c
Fix #33821: cycles background intensity fix had uninitialized memory usage
for area lights.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@53712 954f8c5b-7b00-dc11-b283-0030488c597c