Flip in throughmode for SW/HW T&L

I try the use the logic from  the following UV texturing 

		if (gstate.isModeThrough()) {
			// We never get here because we don't use HW transform with through mode.
			// Although - why don't we?
			uvscaleoff[0] /= gstate_c.curTextureWidth;
			uvscaleoff[1] /= gstate_c.curTextureHeight;
			uvscaleoff[2] /= gstate_c.curTextureWidth;
			uvscaleoff[3] /= gstate_c.curTextureHeight;
		} else {
			uvscaleoff[0] *= 2.0f;
			uvscaleoff[1] *= 2.0f;
		}