Description:
------------
When changing the visibility of a static method from a trait, it seems the methods 
static-ness is removed.

The test script should be expected to work, as B uses A::foo as public.  Instead 
you get a fatal error: "Non-static method B::foo() cannot be called statically".

Omitting the 'as' segment throws an expected visibility error "Call to protected 
method B::foo() from context ''".

Note: the same occurs when visibility isn't changed (but as is still used), e.g. 
if A::foo is declared public but B's definition doesn't change, the same problem 
is found.  The only solution that will run is to not change static method 
visibility, and instead change the trait definition.

Test script:
---------------
<?php

trait A {
   protected static function foo() { echo 'lolwas'; }
}

class B {
   use A {
      A::foo as public;
   }
}

B::foo();

?>

Expected result:
----------------
lolwas

Actual result:
--------------
Fatal error: Non-static method B::foo() cannot be called statically in 
C:\Server\Apache\htdocs\tests\trait_static_visibility.php on line 13