From b430f8b6ed11471917db1b0cb9bc445bcfb922e9 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Wed, 19 Aug 2015 15:45:56 +0200
Subject: Fixes issue with Tut 8.5 (segfault on creating new MDI window)

---
 Linux_C_12/cCrossCallWindows_121.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'Linux_C_12')

diff --git a/Linux_C_12/cCrossCallWindows_121.c b/Linux_C_12/cCrossCallWindows_121.c
index 0ca7d4d..f0fbbfb 100644
--- a/Linux_C_12/cCrossCallWindows_121.c
+++ b/Linux_C_12/cCrossCallWindows_121.c
@@ -731,7 +731,8 @@ void EvalCcRqCREATEMDIDOCWINDOW (CrossCallInfo *pcci)		/* textptr, clientPtr, be
     printf("EvalCcRqCREATEMDIDOCWINDOW\n");
     pwintitle = (const gchar *) pcci->p1;
     client    = GTK_WIDGET(pcci->p2);
-    behind	  = GTK_WIDGET(pcci->p3);
+    if (pcci->p3 != -1)
+        behind	  = GTK_WIDGET(pcci->p3);
     left	  = pcci->p4>>16;
     top		  = (pcci->p4<<16)>>16;
     width     = pcci->p5>>16;
@@ -748,7 +749,10 @@ void EvalCcRqCREATEMDIDOCWINDOW (CrossCallInfo *pcci)		/* textptr, clientPtr, be
     gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                     GTK_POLICY_AUTOMATIC,
                     GTK_POLICY_AUTOMATIC);
-    index = gtk_notebook_page_num(GTK_NOTEBOOK(client), behind);
+    if (behind == NULL)
+        index = gtk_notebook_page_num(GTK_NOTEBOOK(client), behind);
+    else
+        index = -1;
     gtk_notebook_insert_page(GTK_NOTEBOOK(client), sw,
                     pwintitle ? gtk_label_new(pwintitle) : NULL,
                     index);
-- 
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