[PATCH 1/2] windowscodecs: Implement DdsDecoder_GetFrameCount().

[Ziqing Hui]

The added tests code is to test the return value of DdsDecoder_GetFrameCount() when decoder is not initialized or parameter is NULL.

Signed-off-by: Ziqing Hui 
---
 dlls/windowscodecs/ddsformat.c       | 40 +++++++++++++++++++++++++---
 dlls/windowscodecs/tests/ddsformat.c | 11 +++++---
 2 files changed, 44 insertions(+), 7 deletions(-)

[Esme Povirk (they/them)]

Signed-off-by: Vincent Povirk