Add asserts to provide better details on NULL result pointers.
Add asserts to provide better details on NULL result pointers.

These should be safely filtered out upstream now, but this will
log better root cause info if any of them are NULL for other reasons.

kinjalcpatel/kinetic-c,kinjalcpatel/kinetic-c,rcrane/kinetic-c,benmcclelland/kinetic-c,chenchongli/kinetic-c,Kinetic/kinetic-c,Kinetic/kinetic-c,kinjalcpatel/kinetic-c,Seagate/kinetic-c,benmcclelland/kinetic-c,benmcclelland/kinetic-c,chenchongli/kinetic-c,chenchongli/kinetic-c,kinjalcpatel/kinetic-c,rcrane/kinetic-c,benmcclelland/kinetic-c,Seagate/kinetic-c,Seagate/kinetic-c,chenchongli/kinetic-c,benmcclelland/kinetic-c,Kinetic/kinetic-c,rcrane/kinetic-c,Kinetic/kinetic-c,rcrane/kinetic-c,Seagate/kinetic-c