Changed class to class_id

AlexeyAB

2018-03-01 35a66b73a25ab93f2a3ceb85993d4801240046a4

 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);