sms-pdu-decode family: fix VP-Relative header spacing When VP-Relative is small enough to be reckoned in 5 min or 30 min units, it was printed incorrectly, with a cosmetic defect of one extra space. Fix this bug.

extern void serial_out();

void
putchar(ch)
{
	if (ch == '\n')
		serial_out('\r');
	serial_out(ch);
}