[fpc-pascal] Dynamic arrays, yet another pitfall

[Marco van de Voort]

In our previous episode, Martin Frb said:
> Just because there is a function, that includes copying (when modifying 
> the array), does not mean there is copy on write.

So basically, if for a given size x, setlength(x,1) always reallocates, then
it is COW, otherwise not :-)

(and even if it does, one could still argue it is an implementation detail)