fix: return false if PLACE_VEHICLE and missing flag

Signed-off-by: Alexander Brandes <mc.cache@web.de>

Core/src/main/java/com/plotsquared/core/util/EventDispatcher.java

@@ -551,6 +551,7 @@ public class EventDispatcher {
                             )
                     );
                 }
+                return false;
             }
             default -> {
             }