Merged
requested to merge ATLAS-EGamma/athena:TrkAlignableSurfaces_ATLAS_CHECK_THREAD_SAFETY into master
Add ATLAS_CHECK_THREAD_SAFETY for AlignableSurfaces
The member variable did not seem to need to be mutable ...
Add ATLAS_CHECK_THREAD_SAFETY for AlignableSurfaces
The member variable did not seem to need to be mutable ...