* stmt.c (all_cases_count, mark_seen_cases):  New functions.
(BITARRAY_TEST, BITARRAY_SET):  New macros.  Used (mainly by
Chill) to check all cases are covered (for enums and ranges).
(check_for_full_enumeration_handling):  Re-write to use the
new functions, now that we have them.

From-SVN: r8009