Runtime error fixes for AI camera chunks and ZAS ZConnect()

code/WorkInProgress/AI_Visibility/chunk.dm

@@ -216,6 +216,9 @@
 			images_added += t.obscured
 
 	for(var/mob/aiEye/eye in seenby)
-		if(eye.ai.client)
-			eye.ai.client.images -= images_removed
-			eye.ai.client.images |= images_added
+		if(eye.ai)
+			if(eye.ai.client)
+				eye.ai.client.images -= images_removed
+				eye.ai.client.images |= images_added
+		else
+			seenby -= eye

code/ZAS/Functions.dm

@@ -123,7 +123,7 @@ proc/ZConnect(turf/A,turf/B)
 		var/list/connections = air_master.tiles_with_connections["\ref[A]"]
 		for(var/connection/C in connections)
 			C.Cleanup()
-			if(C.B == B || C.A == B)
+			if(C && (C.B == B || C.A == B))
 				return
 
 	new /connection(A,B)