Added max_boxes for yolo v3

AlexeyAB

2018-03-30 35cc0aaa15b991b348cc8d9623eed5d4f8a1e435

 src/network.h

@@ -57,6 +57,7 @@
    float exposure;
    float saturation;
    float hue;
   int small_object;

    int gpu_index;
    tree *hierarchy;