Use zend_long_to_str in wddx

ext/wddx/wddx.c

@@ -300,8 +300,7 @@ PS_SERIALIZER_DECODE_FUNC(wddx)
 	if ((ret = php_wddx_deserialize_ex(val, vallen, &retval)) == SUCCESS) {
 		ZEND_HASH_FOREACH_KEY_VAL(Z_ARRVAL(retval), idx, key, ent) {
 			if (key == NULL) {
-				key = STR_ALLOC(MAX_LENGTH_OF_LONG, 0);
-				key->len = snprintf(key->val, key->len + 1, "%ld", idx);
+				key = zend_long_to_str(idx);
 			} else {
 				STR_ADDREF(key);
 			}
@@ -513,8 +512,7 @@ static void php_wddx_serialize_object(wddx_packet *packet, zval *obj)
 				php_wddx_serialize_var(packet, ent, tmp TSRMLS_CC);
 				STR_RELEASE(tmp);
 			} else {
-				key = STR_ALLOC(MAX_LENGTH_OF_LONG, 0);
-				key->len = snprintf(key->val, key->len + 1, "%ld", idx);
+				key = zend_long_to_str(idx);
 				php_wddx_serialize_var(packet, ent, key TSRMLS_CC);
 				STR_RELEASE(key);
 			}
@@ -570,8 +568,7 @@ static void php_wddx_serialize_array(wddx_packet *packet, zval *arr)
 			if (key) {
 				php_wddx_serialize_var(packet, ent, key TSRMLS_CC);
 			} else {
-				key = STR_ALLOC(MAX_LENGTH_OF_LONG, 0);
-				key->len = snprintf(key->val, key->len + 1, "%ld", idx);
+				key = zend_long_to_str(idx);
 				php_wddx_serialize_var(packet, ent, key TSRMLS_CC);
 				STR_RELEASE(key);
 			}