RRO idmap: pad with 0xffffffff, not 0x00000000

In the new idmap format (version 0x1), 0x00000000 no longer represents a
non-existing entry: 0xffffffff should be used instead.

Bug: 17765434
Change-Id: If2c7e09feba2224eeafe88fd9230e6392d81b9a7
1 file changed