[XS] JDK-8180413 : avoid accessing NULL in jdk.jdwp.agent

[Baesken, Matthias]

Hello, could you please review this small change :

http://cr.openjdk.java.net/~mbaesken/webrevs/8180413/

it fixes a number of places in   jdk.jdwp.agent   where in case of an error it is attempted to write to NULL .

Bug :  JDK-8180413 : avoid accessing NULL in jdk.jdwp.agent


https://bugs.openjdk.java.net/browse/JDK-8180413


Best regards, Matthias