SDL_rwops.c: stdio_seek - skip API call for RW_SEEK_CUR with 0 offset #10560
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Description
This is the SDL2 side of a PR optimizing the stdio implementation of
SDL_RWseek(..., 0, RW_SEEK_CUR).I did not change any implementations other than stdio because I am confident that
fseek(fp, 0, SEEK_CUR)is a no-op, and I'm not certain about the other implementations. It's also possible that the underlying API is better optimized on other platforms, but we have a confirmed 1-minute hang on 3DS resulting fromfseekgetting called bySDL_RWtell.Please feel free to alter my branch, it exists only for the sake of this PR.
Existing Issue(s)
#10556 (fixes SDL2 side only)