Fix Surface ctors which use other surfaces

[KadinTucker]

Surfaces constructed using the overloads taking in other surfaces, https://github.com/SaurabhTotey/d2d/blob/master/source/d2d/sdl2/Surface.d#L143-L157 and https://github.com/SaurabhTotey/d2d/blob/master/source/d2d/sdl2/Surface.d#L167-L172, do not work as intended as rather than creating a copy of the surface they use the same surface as passed by reference. This should be fixed so that copying surfaces is a possibility.