Nearly Raw Raster Data Sanity Check
nrrdSanity calls the nrrdSanity() check to verify the correctness of all
the information (set at compile-time) about the architecture, such as
endianness, 32/64-bit, and the size of various types, as well as running
sanity checks on the global default (nrrdDefault*) and state (nrrdState*)
As a convenience, nrrdSanity also list the availability of the different
formats and data encodings (for Nrrd files) supported by this build.