Minor: vdummy signature fixed.
pfq_functional_node struct has the initialized boolean value.
Set initialized to true when init function is successfully executed.
pfq_computation_fini function is safe to be called in case of some init failures.
Fix: fini stage doesn't terminate at first error.
Fini functions are called in reverse order.
Minor changes.
In case of pfq_computation_init failure, call pfq_computation_fini and exit.