Added preview boxes for SO/DLL usage

AlexeyAB

2018-01-24 cc6ab9b3ccf48322b97f7fe096381d5594d198f7

 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);