Clarify ambiguous math functions in subspace to fix Windows build.
Clarify ambiguous math functions in subspace to fix Windows build.

git-svn-id: d5469d78598a82f75b3d1e6419ce8b4d1ddac974@4341 aa0779c3-6ec2-4b84-a212-a405c134cd8d

pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA,pemryan/DAKOTA