From acdb05e436a78c5d397835fa56d78dadbcdfb4da Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Fri, 21 Aug 2015 20:01:33 +0200
Subject: Fixing unsafe cast to GtkCheckMenuItem

---
 Linux_C_12/cCrossCallMenus_121.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Linux_C_12/cCrossCallMenus_121.c b/Linux_C_12/cCrossCallMenus_121.c
index e8f92bc..f8ef0d6 100644
--- a/Linux_C_12/cCrossCallMenus_121.c
+++ b/Linux_C_12/cCrossCallMenus_121.c
@@ -77,7 +77,8 @@ static void menuitem_activate_handler(GtkMenuItem *menu_item)
     if (in_handler_flag == 0)
     {
         in_handler_flag = 1;
-        gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(menu_item), !(GTK_CHECK_MENU_ITEM(menu_item)->active));
+        if (GTK_IS_CHECK_MENU_ITEM(menu_item))
+            gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(menu_item), !(GTK_CHECK_MENU_ITEM(menu_item)->active));
         GdkEvent* event = gtk_get_current_event();
         if (!event || event->key.type != GDK_KEY_RELEASE) // We only look for key presses, otherwise every shortcut fires twice
             SendMessage2ToClean (CcWmCOMMAND, GTK_WIDGET(menu_item), GetModifiers ());
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