sclp_chars_in_buffer
if (sclp_conbuf != NULL && sclp_chars_in_buffer(sclp_conbuf) != 0 &&
unsigned int sclp_chars_in_buffer(struct sclp_buffer *);
if (sclp_ttybuf && sclp_chars_in_buffer(sclp_ttybuf) &&
count = sclp_chars_in_buffer(sclp_ttybuf);
count += sclp_chars_in_buffer(t);