CWD is accidentally ovewritten by another session

[nobeans]

console A:

$ cd /tmp/a
$ groovyclient -e  "org.codehaus.groovy.tools.shell.Main.main(args)"
Groovy Shell (1.7.6, JVM: 1.6.0_22)
Type 'help' or '\h' for help.
groovy:000> 

console B:

$ cd /tmp/b
$ groovyclient -e  "org.codehaus.groovy.tools.shell.Main.main(args)"
$

===> immediately return to prompt (Cannot change current directory because another session is running on different directory)

$ groovyclient -e  "org.codehaus.groovy.tools.shell.Main.main(args)"
Groovy Shell (1.7.6, JVM: 1.6.0_22)
Type 'help' or '\h' for help.
groovy:000> 

===> at 2nd time, you can successfully start a shell...

[nobeans]

fixed at 8dcc0dd
it will be release at v0.6