Improving getPackageName(Class) to be class.getPackage().getName(). This method then becomes one of the null-protection only methods... which are imo struggling for justification

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@763561 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/lang/ClassUtils.java

@@ -224,7 +224,7 @@ public class ClassUtils {
         if (cls == null) {
             return StringUtils.EMPTY;
         }
-        return getPackageName(cls.getName());
+        return cls.getPackage().getName();
     }
 
     /**