Guard against a missing decoder table in CRW files
Tidy up and fix coverity issues in CIFF parser
Fix potential negative shift (coverity found issue)
Replace the dcraw code with standard BitPumpMSB
Remove unneeded test
Remove some of the dcraw quirks from getbithuff
Use the proper array delete for a string
Cleanup unneeded reference to XMP text inside MOS
Guard against underflow
Init alt_layout in constructor (coverity warning)
Use array delete for string
Guard against too large a shift
Merge pull request #664 from pedrocr/coverity-fixes

Rawspeed fixes resulting from coverity scan