This is a -pedantic warning from gcc.
* src/misc/bitvect.cc, src/misc/bitvect.hh (storage_): Remove.
(storage): New method to access past the end of the struct.
* src/misc/bitvect.cc, src/misc/bitvect.hh: Do
not assume the two bitvect with the same size have
the same number of allocated blocks. Fix an
assertion in extra_range().
* src/misc/bitvect.cc: Conditionally declare fnv<8>, so that the C++
parser does not choke on 14695981039346656037UL when compiling on a
32bit host. Problem observed with g++ 4.0.1 and 4.2.1 on Darwin.
