[gnome-calculator] Math buttons: fix a (potential) crash loading financial dialogs

[Alberto Ruiz <aruiz src gnome org>]

commit 33e74c4cc27b6ed3f53bca2b48980a4a6964f716
Author: Tobias Mueller <muelli cryptobitch de>
Date:   Mon Sep 19 20:20:48 2016 +0100

    Math buttons: fix a (potential) crash loading financial dialogs

 src/math-buttons.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/math-buttons.vala b/src/math-buttons.vala
index 5c9ec11..ff03591 100644
--- a/src/math-buttons.vala
+++ b/src/math-buttons.vala
@@ -129,7 +129,7 @@ public class MathButtons : Gtk.Box
         for (var i = 0; i < entry_names.length; i++)
         {
             var entry = financial_ui.get_object (entry_names[i]) as Gtk.Entry;
-            if (i != ctrm_entries.length - 1)
+            if (i != entry_names.length - 1)
                 entry.set_data<Gtk.Entry> ("next-entry", financial_ui.get_object (entry_names[i+1]) as 
Gtk.Entry);
             entry.activate.connect (finc_activate_cb);
         }