fix a memory leak

Author: withinboredom

Zend/zend_namespaces.c

@@ -47,7 +47,7 @@ static zend_class_entry *insert_namespace(const zend_string *name, zend_string *
          ns = zend_hash_find_ptr(EG(namespaces), needle);
 
          if (!ns) {
-            zend_string *full_name = zend_string_init(ZSTR_VAL(name), len, 0);
+            zend_string *full_name = zend_string_init(ZSTR_VAL(name), len, 1);
             zend_string *interned_name = zend_new_interned_string(full_name);
             ns = create_namespace(interned_name);
             ns->lexical_scope = parent_ns;