* gas-test.scm (<keyword> test-data): Catch invalid requests,

	* gas-test.scm (<keyword> test-data): Catch invalid requests,
	flag a warning and compensate.
	(<hw-address test-data): Tweak for readability.
	(<hw-iaddress test-data): Ditto.
	(cgen-build.sh): Convert symbols to strings before passing to
	string-append.
	(cgen-allinsn.exp): Ditto.