[PATCH] windowscodecs: Add stub for IWICDdsEncoder.

[Ziqing Hui]

Signed-off-by: Ziqing Hui <zhui(a)codeweavers.com>
---
 dlls/windowscodecs/ddsformat.c | 63 ++++++++++++++++++++++++++++++++--
 include/wincodec.idl           | 19 ++++++++++
 2 files changed, 80 insertions(+), 2 deletions(-)