Proofed that iostreams break threads

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1313 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/menu.cpp

@@ -180,7 +180,7 @@ static void gtk_menu_clicked_callback( GtkWidget *widget, wxMenu *menu )
 	else
 	{
 	    /* the user pressed on the menu item -> report */
-	    item->m_isChecked;  /* make consistent again */
+	    item->m_isChecked = item->IsChecked();  /* make consistent again */
 	}
     }