Review request for 6924497: HotSpotDiagnosticsMXBean.getDiagnosticOptions throws NPE

[Mandy Chung]

Dan,

Can you review the fix for:
  6924497: HotSpotDiagnosticsMXBean.getDiagnosticOptions throws NPE

Webrev at:
  http://cr.openjdk.java.net/~mchung/6924497/webrev.00/

The VM fix for 6898160 updates the jmm_GetVMGlobals function 
to filter out unsupported type and the returning array may contain 
null elements.  The sun.management.Flag class needs to check 
for null elements and handle unsupported types gracefully.

Thanks
Mandy