Compile error fix

AlexeyAB

2018-04-03 be9d971ddb9ea0520da78cfff7788eb5481f095e

 src/network_kernels.cu

@@ -121,7 +121,7 @@
   }
#endif
    forward_network_gpu(net, state);
   cudaStreamSynchronize(get_cuda_stream());
   //cudaStreamSynchronize(get_cuda_stream());
    backward_network_gpu(net, state);
}