rc = castDouble2Float(arg1, arg2)
This is a dummy function, just here as a placeholder for the
castDouble2Float.oct file which is needed when running under Octave.
castDouble2Float.m is needed on Matlab, so Matlab does not complain
about non-existing functions.
Update: castDouble2Float is not even needed on Octave anymore, so this is
really a placeholder just to keep old code working that relied on its now
"no op" presence.
Psychtoolbox/PsychOpenGL/MOGL/core/castDouble2Float.m