Fixed a bug with Filter Modules /w Control where a Control entry of 0 did not...

Fixed a bug with Filter Modules /w Control where a Control entry of 0 did not actually turn Masked filter modules off.

git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@2712 6dcd42c9-f523-4c6d-aada-af552506706e