fix bitfield output missing bytes

ir/be/ia32/ia32_gen_decls.c

@@ -424,6 +424,7 @@ static void dump_compound_init(obstack_t *obst, entity *ent)
 				      get_entity_ld_name(ent));
 			}
 
+			value_len += offset_bits;
 			for(j = 0; j < 4 && value_len > 0; ++j) {
 				assert(offset + j < type_size);
 				assert(vals[offset + j].kind == BITFIELD || vals[offset + j].v.value == NULL);