apex_file: fix a use of uninitialized memory

If opening the `unique_fd` here fails, we'll call
`CloseArchive(garbage)`, which could be harmful. It looks like
OpenArchiveFd initializes `handle` to _something_ even on failure, so we
don't obviously have to move it below the `ret < 0` block.

Bug: None
Test: TreeHugger
Change-Id: I46ecfdc86264109e77699eb73474a515400d96cf
1 file changed