The day before the Olympics began, I ate at a warung nasi Padang hidden at the end of a grubby corridor on the upper floor of a central London shopping mall. Opposite us, a canny Chinese stall-holder had stocked up on flags that visitors could buy to wave around in enthusiastic support of their athletes. Ethiopia, the US, Italy, Cameroon: they were all there. But no Indonesia. Sold out, perhaps? No, said Firdaus who runs the warung; they never had…