Description:
------------
My custom zend_object look for doc_comment and get an error message from valgrind.

I can fix it with ecalloc insteadof emalloc,

// In Zend/zend_arena.h
static zend_always_inline zend_arena* zend_arena_create(size_t size)
{
    //zend_arena *arena = (zend_arena*)emalloc(size);
    zend_arena *arena = (zend_arena*)ecalloc(size, 1);

    [...]
}

but the initialization is partly already done in init_op_array ()
It's missing a :
op_array-> doc_comment = NULL;
but I don't know where.

Can someone take care of it? 

Test script:
---------------
static zend_object*
php_gobject_object_create_object(zend_class_entry *class_type)
{
    php_gobject_object *intern = zend_object_alloc(sizeof(php_gobject_object), class_type);

    zend_object_std_init(&intern->std, class_type);
    object_properties_init(&intern->std, class_type);
    // [...]
    zend_function *f;
    ZEND_HASH_FOREACH_PTR(&class_type->function_table, f) {
        if (f->op_array.doc_comment) {
            php_printf("\n", f->op_array.doc_comment->val);
        }
    }ZEND_HASH_FOREACH_END();

}