Fix style bug in event queue

Same fix as for 1f9812ab835e97ff07f4abba23a7915e04d306c9
Not sure if this code actually does anything though, `buffer_max_used` seems unused.

core/event_queue.cpp

@@ -92,7 +92,7 @@ Error EventQueue::push_call(uint32_t p_instance_ID, const StringName& p_method,
 		*v=p_arg5;
 	}
 
-	if (buffer_max_used>buffer_end);
+	if (buffer_end > buffer_max_used)
 		buffer_max_used=buffer_end;
 
 	return OK;