[PATCH v2 resend] comctl32: Correctly draw disabled toolbar button which contains 32 bpp bitmap with alpha channel.

[Ziqing Hui]

It has been a week since I send this patch and got no reply... so I resend it now.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=24784
Signed-off-by: Ziqing Hui 
---
 dlls/comctl32/imagelist.c |  5 +++++
 dlls/comctl32/toolbar.c   | 12 ++++++++++++
 include/commctrl.h        |  2 ++
 3 files changed, 19 insertions(+)