Move Colorkey option earlier, and remove conflicting DisplayFormatAlpa which isn't needed for transparency when you have a colorkey now. #15
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…ha which isn't needed for transparency when you have a colorkey now.
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I saw another change to restore text display in tuxmth, but this version preserves the same set of surfaces instead of just returning the white letters. It looks like SDL_DisplayFormatAlpha overwrites the transparency that the colorkey call sets up. I moved the colorkey to earlier to make it more clear what's going on with the alpha blend when the bg surface is created.