If we don't know the file size, leave the file size unset.

If it's not a regular file, don't return any data, even if the size is unknown.

Update the Zip test with a hand-tweaked Zip archive that has a
directory (with length-at-end set), a regular file without
length-at-end set, and a regular file with length-at-end set and a bad
CRC.  Update the test code to verify that the file size is unset
for the regular file with length-at-end.

MFC after:	7 days

0 files changed, 0 insertions, 0 deletions