Update ISOUtil.java
Update ISOUtil.java


1. Added new definition for hex2byte. 
public static byte[] hex2byte (String s, Charset charset) {
        if (charset == null) charset = CHARSET;
        if (s.length() % 2 == 0) {
            return hex2byte (s.getBytes(charset), 0, s.length() >> 1);
        } else {
        	// Padding left zero to make it even size #Bug raised by tommy
        	return hex2byte("0"+s, charset);
        }
    }

2. Changed hex2byte (String s) to 
public static byte[] hex2byte (String s) {
        return hex2byte (s, CHARSET);
    }
barspi/jPOS,jpos/jPOS,jpos/jPOS,barspi/jPOS,barspi/jPOS,jpos/jPOS