[gnome-calculator] Added 'period' keypress when the delete key on the numpad is pressed.

[Alberto Ruiz <aruiz src gnome org>]

commit 3d660cb558f74847e48cca733980bf8550fb0151
Author: Myridium <mggrewar hotmail com>
Date:   Sat Jul 23 14:56:09 2016 +1000

    Added 'period' keypress when the delete key on the numpad is pressed.

 src/math-display.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/math-display.vala b/src/math-display.vala
index 2bd39fa..bcb3ce5 100644
--- a/src/math-display.vala
+++ b/src/math-display.vala
@@ -185,6 +185,9 @@ public class MathDisplay : Gtk.Viewport
         case Gdk.Key.KP_Page_Up:
             new_keyval = Gdk.Key.@9;
             break;
+        case Gdk.Key.KP_Delete:
+            new_keyval = Gdk.Key.period;
+            break;
         }
 
         if (new_keyval != 0)