Fix for occasional crashes due to numerical instability in Freestyle Perlin noise modifiers with a large 'octaves' value.
Problem report by Light BWK through personal communications, thanks a lot!

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@60911 954f8c5b-7b00-dc11-b283-0030488c597c
Fix freestyle compile after last commit

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@60912 954f8c5b-7b00-dc11-b283-0030488c597c
OSX/CMake: fix ftemplate condition

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@60913 954f8c5b-7b00-dc11-b283-0030488c597c
make the message for addons failing to parse a little more descriptive (suggested in report [#37196]).


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk/blender@60914 954f8c5b-7b00-dc11-b283-0030488c597c