message: Fix segment fault error if passing in variables can't be serialized to task.
diff: @@ -198,6 +198,10 @@ int php_swoole_task_pack(swEventData *task, zval *data TSRMLS_DC)
  task_data_str = serialized_data.c;
  task_data_len = serialized_data.len;
  #else
  + if(!serialized_data.s)
  + {
  + return -1;
  + }
  task_data_str = serialized_data.s->val;
  task_data_len = serialized_data.s->len;
  #endif
  