Ignore partners who aren't present in the penthouse census. Automatic RA runs...

Ignore partners who aren't present in the penthouse census.  Automatic RA runs when adding new slaves could crash because the slave's partner wasn't added yet.

src/js/utilsSlaves.js

@@ -220,7 +220,7 @@ globalThis.penthouseCensus = function() {
 			return false; // lives in dojo
 		} else if (slave.relationship >= 4) {
 			const partner = getSlave(slave.relationshipTarget);
-			if (assignmentVisible(partner) && partner.ID < slave.ID && partner.rules.living === "luxurious") {
+			if (partner && assignmentVisible(partner) && partner.ID < slave.ID && partner.rules.living === "luxurious") {
 				return false; // living with partner, who is already assigned a room (always allocate a room to the partner with the lower ID)
 			}
 		}