lbmk: Fix regressions

- A spurious semicolon caused the arguments to printf in die() to be
  executed instead of printed
- ${@} in die() needs to be in quotes or else printf prints each word on
  a separate line
- The number of arguments to main() does not include main itself so it
  should be comparing against 1 instead of 2 to determine if enough
  arguments were supplied.

lbmk

@@ -39,7 +39,7 @@ main()
 	elif [ "${0##*/}" = "blobutil" ]; then
 		./update blobs $@ || exit 1
 		exit 0
-	elif [ $# -lt 2 ]; then
+	elif [ $# -lt 1 ]; then
 		die "Too few arguments. Try: ${0} help"
 	fi
 
@@ -121,7 +121,7 @@ listmodes()
 
 die()
 {
-	printf "Error: %s\n"; ${@} 1>&2
+	printf "Error: %s\n" "${@}" 1>&2
 	exit 1
 }