message: Fix return code in case of timeout
diff: @@ -911,7 +911,7 @@ static int mainloop_v4l2(CvCaptureCAM_V4L* capture) {
  if(returnCode == -1)
  return -1;
  if(returnCode == 1)
  - break;
  + return 1;
  }
  }
  return 0;
  @@ -956,7 +956,7 @@ static bool icvGrabFrameCAM_V4L(CvCaptureCAM_V4L* capture) {
  #if defined(V4L_ABORT_BADJPEG)
  // skip first frame. it is often bad -- this is unnotied in traditional apps,
  // but could be fatal if bad jpeg is enabled
  - if(mainloop_v4l2(capture) == -1)
  + if(mainloop_v4l2(capture) != 1)
  return false;
  #endif
  @@ -964,7 +964,7 @@ static bool icvGrabFrameCAM_V4L(CvCaptureCAM_V4L* capture) {
  capture->FirstCapture = 0;
  }
  - if(mainloop_v4l2(capture) == -1) return false;
  + if(mainloop_v4l2(capture) != 1) return false;
  return true;
  }
  