message: Fix squares sample failure when a single file passed
diff: @@ -123,14 +123,14 @@ static void findSquares( const Mat& image, vector<vector<Point> >& squares )
  int main(int argc, char** argv)
  {
  - static const char* names[] = { "pic1.png", "pic2.png", "pic3.png",
  + const char* names[] = { "pic1.png", "pic2.png", "pic3.png",
  "pic4.png", "pic5.png", "pic6.png", 0 };
  help(argv[0]);
  if( argc > 1)
  {
  names[0] = argv[1];
  - names[1] = "0";
  + names[1] = 0;
  }
  for( int i = 0; names[i] != 0; i++ )
  