title: cvFindContours () exception?
body: <p>I am creating real time software, so often cvFindContours is called on a completely black mask. If this case, cvFindContours throws an exception, and the program crashes.</p>
  
  <p>How would I make it so that if cvFindContours is unable to find contours, instead of the program crashing, the program just moves onto the next line of code (just simple continues)?</p>
  
  <p>Thanks</p>
  
  <p>PS: I thought about keeping one pixel automatically always white to prevent cvFindContours from not being able to find an contour, but this would be inconvenient to me.</p>