SDL_RenderTexture calls getting dropped

[kyle-sylvestre]

Some of my texture calls near the bottom of the screen are getting dropped. After debugging I found that these lines are responsible. This is happening on devices where SDL_SetRenderScale is less than one. I believe it was due to GetRenderViewportSize being changed in https://github.com/libsdl-org/SDL/commit/ef758d05c154b6c052918de9f20a83d14b2065cd

https://github.com/libsdl-org/SDL/blob/e027b85cc457556071cbb2f3f1bcf8803c1bc001/src/render/SDL_render.c#L3904-L3910

[AntTheAlchemist]

Same bug as #11318

[icculus]

This is fixed by bf853209470c59f39101da91bb23099be6d286a1, thanks!