[10/11] windowscodecs: Handle IFD fields with count 0 same way as with count 1.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
http://testbot.winehq.org/JobDetails.pl?Key=18988

Your paranoid android.


=== W7PRO (32 bit metadata) ===
metadata.c:505: Test failed: 20: expected count 3, got 4
metadata.c:506: Test failed: 20: expected abc, got abcd

=== W7PROX64 (32 bit metadata) ===
metadata.c:505: Test failed: 20: expected count 3, got 4
metadata.c:506: Test failed: 20: expected abc, got abcd

=== TEST64_W7SP1 (32 bit metadata) ===
metadata.c:505: Test failed: 20: expected count 3, got 4
metadata.c:506: Test failed: 20: expected abc, got abcd

=== W7PROX64 (64 bit metadata) ===
metadata.c:505: Test failed: 20: expected count 3, got 4
metadata.c:506: Test failed: 20: expected abc, got abcd

=== TEST64_W7SP1 (64 bit metadata) ===
metadata.c:505: Test failed: 20: expected count 3, got 4
metadata.c:506: Test failed: 20: expected abc, got abcd