[epiphany] Fix Crash closing last tab with Ctrl+W

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 433ce47815c9cb4d7ee09d828456d27bb6f7663f
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Fri May 10 19:58:08 2019 +0200

    Fix Crash closing last tab with Ctrl+W
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/758

 src/ephy-pages-popover.c | 3 +++
 src/ephy-window.c        | 6 ++++--
 2 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/src/ephy-pages-popover.c b/src/ephy-pages-popover.c
index b490d1a4b..5ee4a9790 100644
--- a/src/ephy-pages-popover.c
+++ b/src/ephy-pages-popover.c
@@ -139,6 +139,9 @@ items_changed_cb (EphyPagesPopover *self,
     g_signal_connect_swapped (items[i], "closed", G_CALLBACK (row_closed_cb), self);
   }
 
+  if (position + removed > added)
+    return;
+
   g_list_store_splice (self->list_store, position, removed, (gpointer) items, added);
 
   current_page_changed_cb (self);
diff --git a/src/ephy-window.c b/src/ephy-window.c
index 81a75977a..fd31a0588 100644
--- a/src/ephy-window.c
+++ b/src/ephy-window.c
@@ -2736,8 +2736,10 @@ notebook_page_removed_cb (EphyNotebook *notebook,
 
   tab_accels_update (window);
 
-  if (gtk_notebook_get_n_pages (window->notebook) == 0)
-    gtk_window_close (GTK_WINDOW (window));
+  if (gtk_notebook_get_n_pages (window->notebook) == 0) {
+    ephy_window_close (window);
+    gtk_widget_destroy (GTK_WIDGET (window));
+  }
 }
 
 static void