Function HideActiveErrorMessage

src/error_gui.cpp:361–367

* Close active error message window * @return true if a window was closed. */

 * @return true if a window was closed.
 */
bool HideActiveErrorMessage()
{
	ErrmsgWindow *w = dynamic_cast<ErrmsgWindow *>(FindWindowById(WC_ERRMSG, 0));
	if (w == nullptr) return false;
	w->Close();
	return true;
}

/**
 * Schedule a list of errors.