RFR 8199773 (bf) XXXBuffer:compareTo method is not working as expected

[Paul Sandoz]

Hi,

Please review this simple fix for a silly mistake when calculating the result 
of comparing two buffers:

  
http://cr.openjdk.java.net/~psandoz/jdk/JDK-8199773-buffer-compare-value/webrev/
 
<http://cr.openjdk.java.net/~psandoz/jdk/JDK-8199773-buffer-compare-value/webrev/>

Paul.