BUG FIXES: - ov->curframe must be checked for each incoming iso packet, otherwise frame might be set to &ov->frame[-1], resulting in massive memory corruption. - Don't include cpufeature.h on 2.2.x kernels (does't exist) - Change kernel version check on new v4l module locking to >= 2.4.17 - ov511.h: Change ov511_sbuf.urb from urb_t to "struct urb" (for 2.5.3 compat.)