do not call isCurrentlyInCreation with null argument (in order to meet newly enforced assertions within the BeanFactory)

org.springframework.beans/src/main/java/org/springframework/beans/factory/config/PropertyPathFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2010 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -193,7 +193,8 @@ public class PropertyPathFactoryBean implements FactoryBean<Object>, BeanNameAwa
 	public Object getObject() throws BeansException {
 		BeanWrapper target = this.targetBeanWrapper;
 		if (target != null) {
-			if (logger.isWarnEnabled() && this.beanFactory instanceof ConfigurableBeanFactory &&
+			if (logger.isWarnEnabled() && this.targetBeanName != null &&
+					this.beanFactory instanceof ConfigurableBeanFactory &&
 					((ConfigurableBeanFactory) this.beanFactory).isCurrentlyInCreation(this.targetBeanName)) {
 				logger.warn("Target bean '" + this.targetBeanName + "' is still in creation due to a circular " +
 						"reference - obtained value for property '" + this.propertyPath + "' may be outdated!");