Review request: 8029106: JVM crashes in Metachunk::Metachunk during parallel class redefinition (PrivateMLetController, anonymous-simple_copy_1)

[Stefan Karlsson]

http://cr.openjdk.java.net/~stefank/8029106

Please, review this bug fix for:

8029106: JVM crashes in Metachunk::Metachunk during parallel class 
redefinition (PrivateMLetController, anonymous-simple_copy_1)
Summary: Fixed overflow bug in VirtualSpaceNode::is_available

thanks,
StefanK