message: Use php_output_activate.
diff: @@ -244,7 +244,7 @@ void sw_coro_save(zval *return_value, php_context *sw_current_context)
  zend_output_globals *coro_output_globals_ptr = (zend_output_globals *) emalloc(sizeof(zend_output_globals));
  memcpy(coro_output_globals_ptr, SWOG, sizeof(zend_output_globals));
  SWCC(current_coro_output_ptr) = coro_output_globals_ptr;
  - bzero(SWOG, sizeof(zend_output_globals));
  + php_output_activate(); // reset output
  }
  else
  {
  