Handle stored files with general purpose bit 3 set

[idoru]

In these cases, the @current_entry is unpacked from the local headers, but the size/compressed size/crc are all set to 0, which causes the PassThruDecompressor to read no bytes instead of the entry size.

This change makes Entry#get_input_stream pass the Entry itself down to Zip::InputStream so that when creating the Decompressor, it can be constructed with the correct number of bytes to be read (iff general purpose bit 3 is set and the size is 0).

May be related to #236 #295

Signed-off-by: Sam Coward scoward@pivotal.io

[coveralls]

Coverage increased (+0.005%) to 96.526% when pulling c787d94 on idoru:handle-gpbit-3 into 05af123 on rubyzip:master.

[sclevine]

@simonoff @olleolleolle any feedback? We'd like to use rubyzip in Cloud Foundry's Cloud Controller, but we're blocked on this PR.

[sclevine]

Thanks!