Fixes for training Yolo on small objects

AlexeyAB

2018-02-07 9ff40baa4f0b005d50c4e3302b4103551160943f

 src/detector.c

@@ -82,6 +82,7 @@
    args.classes = classes;
    args.jitter = jitter;
    args.num_boxes = l.max_boxes;
   args.small_object = l.small_object;
    args.d = &buffer;
    args.type = DETECTION_DATA;
   args.threads = 4;// 8;