memzero
memzero(screenbuf, bufsize);
memzero(colorbuf, bufsize);
memzero(bufp, diff);
memzero(colorp, diff);
memzero(&screenbuf[len], bufsize - len);
memzero(&colorbuf[len], bufsize - len);
memzero(screenbuf, bufsize);
memzero(colorbuf, bufsize);
memzero(sizes, max * sizeof(unsigned int));
memzero((void *)&statics, sizeof(statics));