Fix failure in reading power value during PowerOff state

D-Bus sensor object to read power value is not created during
PowerOff state. Fixed to return 0 power value if sensor object
is not present.

Change-Id: Ibe340cab0483c7a711081197b932aaba0408d333
Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
1 file changed