RFR: 7152948 msghdr structure not initialized properly in DatagramDispatcher

[Shi Jun Zhang]

Hi nio-dev,

In jdk/src/solaris/native/sun/nio/ch/DatagramDispatcher.c, there are 
some invocations of system call sendmsg/recvmsg. The second parameter of 
these 2 calls is a pointer to structure msghdr. The pointer needs to be 
initialized before it can be used. Currently it is initialized with 
#ifdef platform clause and it is NOT initialized properly on AIX. I 
think we can use memset(&m, 0, sizeof(m)) to initialized the pointer 
once for all platforms.

Here is the webrev:
http://cr.openjdk.java.net/~zhangshj/7152948/webrev.00/

-- 
Regards,

Shi Jun Zhang