Fix Sceumd

Fix Narisokonai Eiyuutan: Taiyou to Tsuki no Monogatari black screen
Fix The History Channel: Great Battles of Rome load probrem.
Fix Sora no Kiseki SC change disc issue
Reformat stencilToAlpha a bit
Merge pull request #4892 from sum2012/sceumd

Fix Sceumd
Restore Alpha/ColorDoubling to do before color test
Merge pull request #4910 from raven02/patch-24

Reformat stencilToAlpha a bit