LJpegDecompressor::decodeScan(): assert that CPS is more than 0.
LJpegDecompressor::decodeScan(): assert that CPS is more than 0.

Yay, so clang static analyzer does break the build if it detects something.

darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed