Several fixes getting us closer to GCC compatibility.

NvTriStrip/NvTriStrip.cpp

NvTriStrip/NvTriStrip.h

include/ComplexShape.h

include/NIF_IO.h

include/gen/AVObject.h

include/gen/BoundingBox.h

include/gen/ByteArray.h

include/gen/ControllerLink.h

include/gen/Footer.h

include/gen/FurniturePosition.h

include/gen/Header.h

include/gen/LODRange.h

include/gen/LimitedHingeDescriptor.h

include/gen/MatchGroup.h

include/gen/MipMap.h

include/gen/Morph.h

include/gen/NodeGroup.h

include/gen/OblivionColFilter.h

include/gen/OblivionSubShape.h

include/gen/Particle.h