numenta/nupic — pull request #756 by utensil (2014-03-30 09:01:11+00:00)
Title: Fixing CMake fails when $NTA and $NUPIC are both empty

Confirms $NTA != $NUPIC after applying defaults to them.

Reasoning:

1. This fixes #755
2, This prevents anything breaking $NTA != $NUPIC ( #659 ) in the process of setting these environments.