RFR : 8014189: JVM crash with SEGV in ConnectionGraph::record_for_escape_analysis() - hs24

[Poonam Bajaj]

This review request is for the backport of the fix for 8014189 to hs24. 
The fix has already been integrated into hs25.

Webrev: http://cr.openjdk.java.net/~poonam/8014189/webrev/
Fix: Added NULL checks for Type::make_ptr() returned value.
Testing : JPRT

Thanks,
Poonam