Crash on erroneous ram read

[mitra42]

An attempt to read above the top of Ram should throw an error, not crash.

e.g. -1 @

[mitra42]

STR: $ cd webforth; http-server; open http://localhost;8080/console.html

Open webconsole in the browser

$DDDD @ Console> Attempt to read above top of Rom at 12014

It should THROW i think ....