Fix some %ld message in log messages, and update the Linux sample
code to match recent changes in NufxLib and DiskImgLib.
Also, bump MDC version to 3.0.0 to match Windows version.
Many updates to format strings, largely as a result of changing
various "long" variables to uint32_t.
Fixed the diskimg debug macros for gcc, which requires an extra
"##" to remove the "," when there are no arguments. (Apparently
Visual Studio just strips this away for you.)
Stripped out a couple of dead variables spotted by gcc. Return
the actual error in a couple of HFS file functions.
