sdlError function
SDL_Error() unconditionally returns -1.
extern DECLSPEC int SDLCALL SDL_Error(SDL_errorcode code)
Implementation
int sdlError(int code) {
  final sdlErrorLookupFunction = libSdl2.lookupFunction<
      Int32 Function(Int32 code), int Function(int code)>('SDL_Error');
  return sdlErrorLookupFunction(code);
}