Fixed bug, that save weights-file for each iteration

AlexeyAB

2018-03-16 164ba34279a4d486d6e49409de791817b62ad1ac

 src/demo.c

@@ -143,6 +143,7 @@
        printf("video file: %s\n", filename);
        cap = cvCaptureFromFile(filename);
    }else{
      printf("Webcam index: %d\n", cam_index);
        cap = cvCaptureFromCAM(cam_index);
    }