RFR JDK-8022442: Fix unchecked warnings in HashMap

[Brent Christian]

Looks fine to me, though I'm not a Reviewer (but I think I "contributed" 
a fair number of those warnings O:).

One question: why was enext added?:

1249  Entry<K,V> enext = (Entry<K,V>) newTable[i];
1250  e.next = enext;

Thanks,
-Brent

On 8/6/13 2:11 PM, Dan Smith wrote:
> Please review this warnings cleanup.
>
> Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8022442 (not yet visible)
> Webrev: http://cr.openjdk.java.net/~dlsmith/8022442/webrev.00/
>
> —Dan
>