Remove redundant addref+dtor

Author: nikic

Zend/zend_API.c

@@ -1578,7 +1578,7 @@ ZEND_API int array_set_zval_key(HashTable *ht, zval *key, zval *value) /* {{{ */
 			result = zend_symtable_update(ht, Z_STR_P(key), value);
 			break;
 		case IS_NULL:
-			result = zend_symtable_update(ht, ZSTR_EMPTY_ALLOC(), value);
+			result = zend_hash_update(ht, ZSTR_EMPTY_ALLOC(), value);
 			break;
 		case IS_RESOURCE:
 			zend_error(E_WARNING, "Resource ID#%d used as offset, casting to integer (%d)", Z_RES_HANDLE_P(key), Z_RES_HANDLE_P(key));

ext/spl/spl_iterators.c

@@ -2360,9 +2360,7 @@ static inline void spl_caching_it_next(spl_dual_it_object *intern)
 			zval *data = &intern->current.data;
 
 			ZVAL_DEREF(data);
-			Z_TRY_ADDREF_P(data);
 			array_set_zval_key(Z_ARRVAL(intern->u.caching.zcache), key, data);
-			zval_ptr_dtor(data);
 		}
 		/* Recursion ? */
 		if (intern->dit_type == DIT_RecursiveCachingIterator) {