Fix missing initialisation of variable in sbitmap_union_of_preds()

[Roger Sayle]

On Mon, 22 Nov 2004, Nick Clifton wrote:
>     for (e = NULL, ix = 0; ix < EDGE_COUNT (b->preds); ix++)
>       {
> +       e = EDGE_PRED (b, ix);
>         if (e->src== ENTRY_BLOCK_PTR)
>   	continue;

The assignment "e = NULL" in the first clause of the "for" is
now dead and can also be removed.

Thanks,

Roger
--