CLASS C ASPECT FIX: ATARI WINDOW NOW PRESENTS 2× HORIZONTAL PIXEL ASPECT (Verdict-6 "squished left-right", universal)

A TIA color clock is ~2 scanline-height units wide; square-pixel presentation rendered every title tall-and-narrow (owner verdict 6 on Adventure, true corpus-wide; the old code's width4 WINDOW with width-logical content just pillarboxed square pixels). Fix in the Atari ppu_init (ppu_c.py): SDL_RenderSetLogicalSize(2width, height) with window (2width3, height*3) — the 160-wide TIA framebuffer texture is stretched horizontally by RenderCopy;…

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