Parent snapshot may be null in 1.6.3 for a snapshot that has no parent.
Parent snapshot may be null in 1.6.3 for a snapshot that has no parent.

git-svn-id: a71d58e363398529fa853ff1487e5132e49be02f@26801 9b283d60-5439-405e-af05-b73fd8c4d996

mrihtar/vmwaretasks,modulexcite/vmwaretasks,dblock/vmwaretasks,dblock/vmwaretasks,mrihtar/vmwaretasks,dblock/vmwaretasks,dblock/vmwaretasks,mrihtar/vmwaretasks,modulexcite/vmwaretasks,dblock/vmwaretasks,dblock/vmwaretasks,mrihtar/vmwaretasks,mrihtar/vmwaretasks,modulexcite/vmwaretasks,modulexcite/vmwaretasks,modulexcite/vmwaretasks,mrihtar/vmwaretasks,modulexcite/vmwaretasks