Minor fix - what pip-packages are required for Python scripts

AlexeyAB

2018-05-06 c9b8bdee1886df5f83973d91c3597c28f99a9e0c

 src/cost_layer.c

@@ -31,7 +31,7 @@

cost_layer make_cost_layer(int batch, int inputs, COST_TYPE cost_type, float scale)
{
    fprintf(stderr, "Cost Layer: %d inputs\n", inputs);
    fprintf(stderr, "cost                                           %4d\n",  inputs);
    cost_layer l = {0};
    l.type = COST;