Kick players on merged plots appropriately (#3639)

fix: kick denied player regardless on all connected plots

Core/src/main/java/com/plotsquared/core/command/Deny.java

@@ -161,6 +161,7 @@ public class Deny extends SubCommand {
     }
 
     private void handleKick(PlotPlayer<?> player, Plot plot) {
+        plot = plot.getBasePlot(false);
         if (player == null) {
             return;
         }