Deal with the case of a null asset record (happens with old databases) when checking for a building value in the asset record.
Deal with the case of a null asset record (happens with old databases) when checking for a building value in the asset record.

tdefilip/opennms,roskens/opennms-pre-github,tdefilip/opennms,roskens/opennms-pre-github,rdkgit/opennms,rdkgit/opennms,aihua/opennms,roskens/opennms-pre-github,roskens/opennms-pre-github,roskens/opennms-pre-github,roskens/opennms-pre-github,tdefilip/opennms,rdkgit/opennms,rdkgit/opennms,aihua/opennms,tdefilip/opennms,aihua/opennms,roskens/opennms-pre-github,aihua/opennms,tdefilip/opennms,tdefilip/opennms,rdkgit/opennms,aihua/opennms,aihua/opennms,roskens/opennms-pre-github,tdefilip/opennms,aihua/opennms,roskens/opennms-pre-github,rdkgit/opennms,rdkgit/opennms,rdkgit/opennms,rdkgit/opennms,tdefilip/opennms,roskens/opennms-pre-github,aihua/opennms,aihua/opennms,roskens/opennms-pre-github,rdkgit/opennms,tdefilip/opennms