Fixed up the BANDED_SPECTRUM a bit so that it behaves better outside it's minimum and maximum and observes the extend_above and extend_below flags.
Fixed up the BANDED_SPECTRUM a bit so that it behaves better outside
it's minimum and maximum and observes the extend_above and
extend_below flags.


git-svn-id: 4705079bc6b8aadf675e3696f5c015a6aa4916e3@1278 3c1deb5b-d424-0410-962d-aba41a686d42

hsorby/zinc,OpenCMISS/zinc,OpenCMISS/zinc,OpenCMISS/zinc,hsorby/zinc,OpenCMISS/zinc,hsorby/zinc,hsorby/zinc