Do a part select of the array selection result not the base array.

When doing the part select of an array selection you need to use
the result from the array selection to do the part select not the
base array signal.

elab_net.cc

@@ -2327,7 +2327,7 @@ NetNet* PEIdent::elaborate_net_array_(Design*des, NetScope*scope,
       } while (0);
 #else
       if (name_tail.index.size() > sig->array_dimensions())
-	    tmp = process_select_(des, scope, sig);
+	    tmp = process_select_(des, scope, tmp);
 
 #endif
       return tmp;