Backends: DX9: Fix handling of colored textures (#3844, #3868)
Backends: DX9: Fix handling of colored textures (#3844, #3868)

ocornut/imgui,bkaradzic/imgui,nProtect/imgui,ggtucker/imgui,ocornut/imgui,ggtucker/imgui,bkaradzic/imgui,Flix01/imgui,ggtucker/imgui,nProtect/imgui,bkaradzic/imgui,ocornut/imgui,Flix01/imgui,Flix01/imgui,nProtect/imgui