lplImage appears with a dark rectangle in the left and on the top. (Patch #1067)

On Linux if you grab something from a not jpeg camera the frame appears with a dark rectangle on the left and on the top. The problem is in the "icvSetVideoSize" function. The crop capability is not right implemented. I have modify the function to resolve the problem. See below:

 1static int icvSetVideoSize( CvCaptureCAM_V4L* capture, int w, int h) {
 2
 3#ifdef HAVE_CAMV4L2
 4
 5  if (V4L2_SUPPORT == 1)
 6  {
 7
 8    CLEAR (capture->cropcap);
 9    capture->cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
10
11    if (xioctl (capture->deviceHandle, VIDIOC_CROPCAP, &capture->cropcap) < 0) {
12        fprintf(stderr, "HIGHGUI ERROR: V4L/V4L2: VIDIOC_CROPCAP\n");
13    } else {
14
15        CLEAR (capture->crop);
16        capture->crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
17        capture->crop.c= capture->cropcap.defrect;
18
19        //http://v4l2spec.bytesex.org/spec-single/v4l2.html#CROP
20
21        /*capture->crop.c.left       = 0;
22        capture->crop.c.top        = 0;
23        capture->crop.c.height     = h*24;
24        capture->crop.c.width      = w*24;*/
25
26        /* set the crop area, but don't exit if the device don't support croping */
27        if (xioctl (capture->deviceHandle, VIDIOC_S_CROP, &capture->crop) < 0) {
28            fprintf(stderr, "HIGHGUI ERROR: V4L/V4L2: VIDIOC_S_CROP\n");
29        }
30
31    }
32
33    CLEAR (capture->form);
34    capture->form.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
35
36    /* read the current setting, mainly to retreive the pixelformat information */
37...