In previous revisions of Dolphin, changing texture generation settings (via
GX_SetTexCoordGen for example) did not regenerate the vertex shader and flush
the vertices. Adding this flush should fix texture problems in a few game, for
example in Superman: Shadow of Apokolips:
Before: http://i.imgur.com/mHmfb.jpg
After: http://i.imgur.com/2ThES.png
