- re: 0x80000000 bug: can reproduce warning using 32 bit cc
- more 24 and 32 bit testing
- add test cases for 24 and 32 bit reads (remember to check pp and C)
- check inline::c 24/32 bit reads on big endian platforms
- optimize Wav/Write as was done for Wav/Read - use _init_write_sub() first,
  then Inline::C
- use XS instead of Inline for portability?