RFR: 8215395: Allow null oops in Dictionary and JNIHandle verification

[coleen.phillimore at oracle.com]

+1.  Also trivial.
Coleen

On 12/14/18 5:27 AM, Erik Österlund wrote:
> Hi Per,
>
> Looks good.
>
> Thanks,
> /Erik
>
> On 2018-12-14 09:18, Per Liden wrote:
>> JDK-8214784 adjusted the Dictionary and JNIHandle verification, but 
>> failed to take into account that these oops can be null. We should be 
>> using oopDesc::is_oop_or_null() here rather than just oopDesc::is_oop().
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8215395
>> Webrev: http://cr.openjdk.java.net/~pliden/8215395/webrev.0
>>
>> /Per
>