Description:
------------
Incorrect implementations of interface functions are shown as fatal errors as expected but a wrong line number is given. The error shows the line where the declaration of the class begins instead of the line where the function is incorrectly implemented.

Reproduce code:
---------------
<? //line 1
class foo implements ArrayAccess { //line 2
	function offsetSet() {} //line 3
} //line 4
?>


Expected result:
----------------
Fatal error: Declaration of foo::offsetSet() must be compatible with that of ArrayAccess::offsetSet() in ...\index.php on line 3

Actual result:
--------------
Fatal error: Declaration of foo::offsetSet() must be compatible with that of ArrayAccess::offsetSet() in ...\index.php on line 2