dont needlessly gettimeofday in video grabber patch by (Lennert Buytenhek <buytenh at math dot leidenuniv dot nl>)

Originally committed as revision 893 to svn://svn.ffmpeg.org/ffmpeg/trunk

libav/grab.c

@@ -230,9 +230,6 @@ static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
 static int v4l_mm_read_picture(VideoData *s, UINT8 *buf)
 {
     UINT8 *ptr;
-    struct timeval tv_s;
-    //struct timeval tv_e;
-    //int delay;
 
     /* Setup to capture the next frame */
     gb_buf.frame = (gb_frame + 1) % gb_buffers.frames;
@@ -244,8 +241,6 @@ static int v4l_mm_read_picture(VideoData *s, UINT8 *buf)
         return -EIO;
     }
 
-    gettimeofday(&tv_s, 0);
-
     while (ioctl(s->fd, VIDIOCSYNC, &gb_frame) < 0 &&
            (errno == EAGAIN || errno == EINTR));