`FujiDecompressor::decompressThread()`: move `BitPumpMSB` creation into `try` block
`FujiDecompressor::decompressThread()`: move `BitPumpMSB` creation into `try` block

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