Fixed compile error

AlexeyAB

2018-01-25 e11430970b5470fb92127901454a1c90e5cc45e4

 src/region_layer.c

@@ -419,6 +419,7 @@
    free(cpu_state.input);
    if(!state.train) return;
    cuda_push_array(l.delta_gpu, l.delta, l.batch*l.outputs);
   cudaStreamSynchronize(get_cuda_stream());
    if(cpu_state.truth) free(cpu_state.truth);
}