[latexila] MainWindow: stop TeplTab::close-request signal emission

[Sébastien Wilmet <swilmet src gnome org>]

commit 72b9aa0f20534435cb4d761e4f7e206d83eaa939
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Nov 25 07:18:24 2017 +0100

    MainWindow: stop TeplTab::close-request signal emission
    
    TeplTab::close-request has now a default object method handler, which
    will be used in latexila in the future, but not yet now.

 src/main_window.vala |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/main_window.vala b/src/main_window.vala
index c7f00be..b6edd4d 100644
--- a/src/main_window.vala
+++ b/src/main_window.vala
@@ -701,7 +701,10 @@ public class MainWindow : ApplicationWindow
         if (tab == null)
             return null;
 
-        tab.close_request.connect (() => { close_tab (tab); });
+        tab.close_request.connect (() => {
+            close_tab (tab);
+            Signal.stop_emission_by_name (tab, "close-request");
+        });
 
         Document doc = tab.document;