explicitly return None on error, bail in buildLocalChainges on error and return None (which is expected by callers such as checkin
explicitly return None on error, bail in buildLocalChainges on error and return None (which is expected by callers such as checkin

fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary