no need to call isnan() on unsigned ints (causes error on freebsd/clang)


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61219 954f8c5b-7b00-dc11-b283-0030488c597c
mistake in last commit


git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@61220 954f8c5b-7b00-dc11-b283-0030488c597c