Remove truth only if smaller than 1x1 pix during training

AlexeyAB

2018-04-10 2ce6460c79e06caa33eab3991ee3e7fd9f0909d6

 src/yolo_v2_class.cpp

@@ -69,6 +69,7 @@
   }
   set_batch_network(&net, 1);
   net.gpu_index = cur_gpu_id;
   fuse_conv_batchnorm(net);

   layer l = net.layers[net.n - 1];
   int j;