[PATCH 4/4] comctl32/imagelist: Support flag ILS_SATURATE for ImageList_DrawIndirect().

[Ziqing Hui]

Note: the grayscale algorithm which I implemented(Gray = R*0.299 + G*0.587 + B*0.114) is identical to the windows behavior. This can be indicated by [PATCH 2/4].

Signed-off-by: Ziqing Hui 
---
 dlls/comctl32/imagelist.c       | 24 ++++++++++++++++++------
 dlls/comctl32/tests/imagelist.c |  1 -
 2 files changed, 18 insertions(+), 7 deletions(-)