Make migration indications not crash the provider if they fail to be created.  Also make raise_indication() tolerant of getting a NULL.
Make migration indications not crash the provider if they fail to be
created.  Also make raise_indication() tolerant of getting a NULL.

Signed-off-by: Dan Smith <787803eb1755f35291827d0f0268aa9bc7a57464@us.ibm.com>

libvirt/libvirt-cim,libvirt/libvirt-cim,libvirt/libvirt-cim