[gnome-calculator] Created experimental insert character code

[Robert Roth <robertroth src gnome org>]

commit bfe08f8b7eeca7d3987ddd99ade0b51193c11837
Author: A.M. Rowsell <amrowsell frozenelectronics ca>
Date:   Thu Oct 22 05:23:55 2020 +0000

    Created experimental insert character code
    
    This code breaks the unicode string down into UTF-8 bytes and
    then inserts them into the equation display.

 src/math-buttons.vala | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)
---
diff --git a/src/math-buttons.vala b/src/math-buttons.vala
index cbda5672..aaa01a62 100644
--- a/src/math-buttons.vala
+++ b/src/math-buttons.vala
@@ -614,17 +614,20 @@ public class MathButtons : Gtk.Box
 
     private void character_code_dialog_response_cb (Gtk.Widget dialog, int response_id)
     {
-        var text = character_code_entry.get_text ();
-
+        string text = character_code_entry.get_text ();
         if (response_id == Gtk.ResponseType.OK)
         {
             var x = new Number.integer (0);
-            for (var i = 0; text[i] != '\0'; i++)
+            var decoded = text.data;
+            var len = decoded.length;
+            for (var i = 0; i < len; i++)
             {
-                x = x.add (new Number.integer (text[i]));
-                x = x.shift (8);
+                x = x.add (new Number.integer (decoded[i]));
+                if(i != (len - 1))
+                {
+                    x = x.shift (8);
+                }
             }
-
             equation.insert_number (x);
         }