Added __float2half_rn() and __half2float()

AlexeyAB

2018-02-22 b2b5756d86670b787dac440020922eeb5e8a1442

 src/captcha.c

@@ -28,7 +28,6 @@

void train_captcha(char *cfgfile, char *weightfile)
{
    data_seed = time(0);
    srand(time(0));
    float avg_loss = -1;
    char *base = basecfg(cfgfile);