dana-i2cat/opennaas — pull request #545 by isartcanyameres (2013-03-18 10:26:42+00:00)
Title: Avoid null poiter exception in isFreeVRRPGroup.

MP-vcpes don't have VRRP configuration (it's set to null), so
calling isFreeVRRPGroup when there is a MP-vcpe already created
launches a nullpointer exception.

This patch fixes this by checking vrrp configuration and group is
not null before trying to compare it.