Fix to SDL_ttf transparency, by ZX81
Fix to SDL_ttf transparency, by ZX81

crawl/sdl-android,crawl/sdl-android,pelya/commandergenius,def-/commandergenius,def-/commandergenius,bob-the-hamster/commandergenius,bob-the-hamster/commandergenius,pelya/commandergenius,sexroute/commandergenius,bob-the-hamster/commandergenius,rversteegen/commandergenius,bob-the-hamster/commandergenius,xyzz/vcmi-build,xyzz/vcmi-build,rversteegen/commandergenius,crawl/sdl-android,dd00/commandergenius,xyzz/vcmi-build,sexroute/commandergenius,xyzz/vcmi-build,def-/commandergenius,sexroute/commandergenius,dd00/commandergenius,def-/commandergenius,rversteegen/commandergenius,rversteegen/commandergenius,pelya/commandergenius,rversteegen/commandergenius,sexroute/commandergenius,pelya/commandergenius,def-/commandergenius,rversteegen/commandergenius,rversteegen/commandergenius,rversteegen/commandergenius,xyzz/vcmi-build,bob-the-hamster/commandergenius,crawl/sdl-android,dd00/commandergenius,pelya/commandergenius,def-/commandergenius,sexroute/commandergenius,bob-the-hamster/commandergenius,def-/commandergenius,pelya/commandergenius,crawl/sdl-android,dd00/commandergenius,sexroute/commandergenius,pelya/commandergenius,dd00/commandergenius,def-/commandergenius,bob-the-hamster/commandergenius,crawl/sdl-android,xyzz/vcmi-build,xyzz/vcmi-build,sexroute/commandergenius,dd00/commandergenius,bob-the-hamster/commandergenius,crawl/sdl-android,dd00/commandergenius,crawl/sdl-android,sexroute/commandergenius,pelya/commandergenius,dd00/commandergenius