[PATCH RFC v2] algol68: Add allocation function for leaf objects

[Jose E. Marchesi]

Hi Pietro.

Given that on the compiler side the leaf switch is very likely known at
compile time, wouldn't it be better to define two malloc functions in
the runtime and thus avoid the conditional in

> +  if (leaf)
> +    res = (void *) GC_MALLOC_ATOMIC (size);
> +  else
> +    res = (void *) GC_MALLOC (size);
> +

at the cost of an extra symbol exported from libga68?