viewer does not keep track of data from lost packages

[alessandromarras]

viewer.py does not keep track of illegal pixel values (coming from lost packages).
pixel values coming from lost packages are labeled by the tcpdump-descrambler as : ==ERRDLSraw# (= 65535, an illegal value)

I think we need to add an error mask between the Utils.split data conversion and the visualization
(auxCrs,auxFn,auxGn) = Utils.split(datareadFrom5hFile)
dataTobeShown[:,:,:,:,iGn] = auxGn
dataTobeShown[:,:,:,:,iCrs] = auxCrs
dataTobeShown[:,:,:,:,iFn] = auxFn
errormap= dataTobeShown == ERRDLSraw #(=65535)
dataTobeShown[errormap,:] = ERRint16 #(=-256)
at this point the vmin=-0.1 should filter out those pixels as "white"