[PATCH 2/3] [v2] gdiplus: Convert to 32bppARGB when PNG image with transparency chunk is loaded. (rebased)

[Akihiro Sagawa]

In v2,
  - Seek tRNS chunk from the stream instead of scanning a palette for better compatiblities.
  - Reword a commit message.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=44409
Signed-off-by: Akihiro Sagawa 
---
 dlls/gdiplus/image.c       | 41 +++++++++++++++++++++++++++++++++++++++++
 dlls/gdiplus/tests/image.c | 10 +++++-----
 2 files changed, 46 insertions(+), 5 deletions(-)