[PATCH v2 0/6] MR8261: comctl32/tests: Check RGB value in test_alpha.

[Ziqing Hui (＠zhui)]

We only check alpha value before, now also check red, green, blue.

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  v2: comctl32/tests: Also test v5 with test_alpha()
      comctl32/tests: Test image flags in test_alpha.
      comctl32/tests: Use winetest_{push,pop}_context in test_alpha.
      comctl32/tests: Test adding 32bpp images with alpha to 24bpp image list.
      comctl32/tests: Test image bitmap bits in test_alpha.
      comctl32/tests: Check RGB value in test_alpha.

https://gitlab.winehq.org/wine/wine/-/merge_requests/8261