[fpc-pascal] WORD (2 bytes) to String conversion

[Marco van de Voort]

In our previous episode, Jürgen Hestermann said:
> > As Marco suggested... Char size might not always be the same. 
> 
> Why that? I hope noone changes the meaning of such long-time types some 
> day. If a new type is needed, then it should get a new name too.

Codegear did this with Delphi 2009 in August 2008, forcing to check all
string code.

However FPC will probably only add a Delphi2009 mode, and code in the
current modes will remain working.