* config/vax/vax.h (CASE_DROPS_THROUGH): Don't define.
	* config/vax/vax.md (casesi): Emit a test-and-branch to make sure
	that the case is in range, to make sure the casesi insn is always
	in range and never falls through.
	(casesi1): Add comment to explain why casesi never falls through.
	Remove the unnamed special case casesi pattern.

From-SVN: r91417