message: Avoiding Divide By Zero Error
  In line 104 `if ( full_neg_lst[i].cols >= box.width && full_neg_lst[i].rows >= box.height )` removed '=' as it causes divide By Zero Error in line 106 and 107 `box.x = rand() % ( full_neg_lst[i].cols - size_x );` when  full_neg_lst[i].cols = size_x or full_neg_lst[i].rows - size_y
diff: @@ -101,7 +101,7 @@ void sample_neg( const vector< Mat > & full_neg_lst, vector< Mat > & neg_lst, co
  srand( (unsigned int)time( NULL ) );
  for ( size_t i = 0; i < full_neg_lst.size(); i++ )
  - if ( full_neg_lst[i].cols >= box.width && full_neg_lst[i].rows >= box.height )
  + if ( full_neg_lst[i].cols > box.width && full_neg_lst[i].rows > box.height )
  {
  box.x = rand() % ( full_neg_lst[i].cols - size_x );
  box.y = rand() % ( full_neg_lst[i].rows - size_y );
  