Don't change the block qii flags if no ac coefficients will be coded in the selected mode. The code previously tried to do this but failed, instead it desynchronized the qii costing with the coded flags. 0.065dB SSIM improvement on 312kbit/sec foreman_cif.y4m.
Don't change the block qii flags if no ac coefficients will be coded in the selected mode. The code previously tried to do this but failed, instead it desynchronized the qii costing with the coded flags. 0.065dB SSIM improvement on 312kbit/sec foreman_cif.y4m.

svn path=/trunk/theora/; revision=17624

brion/theora,brion/theora,brion/theora,brion/theora,brion/theora