Sylvain 99668c286b Simplify SDL_BLENDMODE_MUL 2 lat temu
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SDL3 99668c286b Simplify SDL_BLENDMODE_MUL 2 lat temu
build_config d27db3defa cmake+video: always use altivec.h header for detection + introduce SDL_ENABLE_ALTIVEC 2 lat temu