Description:
------------
The getDocComment() method from the Reflection API (in this case, the ReflectionClass class) returns no result where an if block exists before the documentation comment.

Reproduce code:
---------------
if (!class_exists('AnotherObject'))
{
   require("anotherobject.php");
}

/**
 * Comment to test getDocComment()
 */

class TestObject
{

}

$rclass = new ReflectionClass('TestObject');

echo "Comment: '".$rclass->getDocComment()."'";

Expected result:
----------------
Comment: '/** * Comment to test getDocComment() */'

Actual result:
--------------
Comment: ''