Explain the throw number

git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1620 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
A leading + sign does not mark a valid number

Ignore it and turn it into an error



git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1621 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
Code size optimization

git-svn-id: svn://svn.code.sf.net/p/amforth/code/trunk@1622 fd1c0b69-5d68-47f5-910c-86182ebb6ecd
Merge branch 'hq'