[Author: dmaclach]
[Author: dmaclach]

Fix up GTMGeometryUtils header so that it works properly in a C++ environment

R=thomasvl
DELTA=8  (8 added, 0 deleted, 0 changed)
qokelate/google-toolbox-for-mac,qokelate/google-toolbox-for-mac,qokelate/google-toolbox-for-mac