journal: Fix entry array iteration corruption checks

journal: Fix entry array iteration corruption checks

Previously, we'd try to handle corruption by bumping the index even
if it was an entry array object that was corrupted (which we can't
deal with).

Now, we only try to deal with corrupted entry objects by moving the
corruption handling into generic_array_get().

On top, we also add an additional check for -EADDRNOTAVAIL which can
also be caused by corrupted journal data.