message: Fix in PHP ver < 7.2.
diff: @@ -28,7 +28,6 @@ double PHPCoroutine::socket_connect_timeout = SW_DEFAULT_SOCKET_CONNECT_TIMEOUT;
  double PHPCoroutine::socket_timeout = SW_DEFAULT_SOCKET_TIMEOUT;
  php_coro_task PHPCoroutine::main_task = {0};
  -#if PHP_VERSION_ID >= 70200
  inline void PHPCoroutine::vm_stack_init(void)
  {
  uint32_t size = SW_DEFAULT_PHP_STACK_PAGE_SIZE;
  @@ -46,9 +45,6 @@ inline void PHPCoroutine::vm_stack_init(void)
  EG(vm_stack_page_size) = size;
  #endif
  }
  -#else
  -#define PHPCoroutine::vm_stack_init zend_vm_stack_init
  -#endif
  inline void PHPCoroutine::vm_stack_destroy(zend_vm_stack stack)
  {
  