Fix for r56965 by Tamito:
* Panorama Camera was not working for Blender Internal and Cycles anymore.

Code checked for Freestyle render layer flag, but as the flag is enabled per default, it broke Panorama camera in all cases. It made no sense to check this on a render layer basis anyway... check if Freestyle is enabled in general now instead.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@57166 954f8c5b-7b00-dc11-b283-0030488c597c