BLOCK_ADC referenced an undeclared variable

Loop counter was missing in 'case BLOCK_ADC'
added it as 'size_t bufferRead', and cleaned up formatting.
dmg: remove libcrypto dependency
dmg: fix checksum error
dmg: make dmg's deterministic

for the fUDIFDataForkChecksum.data and fUDIFMasterChecksum.data structures, it
appears as though only the first int is ever used for checksumming, but the
other bytes are still written to the image. Initialize them so they don't
contain random garbage.