Do not assume that bitset_windex is the same width as unsigned. (abitset_unused_clear): Do not assume that bitset_word is the same width as int. (abitset_op1): Use -1, not ~0, as memset arg (for portability to one's complement hosts!).
* lib: Update the bitset implementation from upstream. * src/closure.c, src/lalr.c, src/output.c, src/print_graph.c, * src/state.c: Use BITSET_FOR_EACH, not BITSET_EXECUTE. * src/main.c: Adjust bitset stats calls.
