Import DeedTemplate in PlaceAssetMsgHandler

c7747467 used DeedTemplate._deeds in the deed placement check without
importing it, which broke the build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/net/client/handlers/PlaceAssetMsgHandler.java

@@ -18,6 +18,7 @@ import engine.net.client.msg.ErrorPopupMsg;
 import engine.net.client.msg.PlaceAssetMsg;
 import engine.net.client.msg.PlaceAssetMsg.PlacementInfo;
 import engine.objects.*;
+import engine.parsers.objects.DeedTemplate;
 import engine.server.MBServerStatics;
 import org.joda.time.DateTime;
 import org.pmw.tinylog.Logger;