Added include for sprintf

AlexeyAB

2018-03-12 15c89e7a714e7e37c13618eace9325a06f0642fc

 src/convolutional_layer.c

@@ -305,8 +305,8 @@

        l.weights_gpu = cuda_make_array(l.weights, c*n*size*size);
#ifdef CUDNN_HALF
      l.weights_gpu16 = cuda_make_array(l.weights, c*n*size*size / 2);
      l.weight_updates_gpu16 = cuda_make_array(l.weight_updates, c*n*size*size / 2);
      l.weights_gpu16 = cuda_make_array(NULL, c*n*size*size / 2); //cuda_make_array(l.weights, c*n*size*size / 2);
      l.weight_updates_gpu16 = cuda_make_array(NULL, c*n*size*size / 2); //cuda_make_array(l.weight_updates, c*n*size*size / 2);
#endif
        l.weight_updates_gpu = cuda_make_array(l.weight_updates, c*n*size*size);