[gcalctool] Fix insert character code

[Robert Ancell <rancell src gnome org>]

commit a7ca1a6c3576f385eb41e0f5cc673c013cfe5e57
Author: Robert Ancell <robert ancell gmail com>
Date:   Fri Apr 16 17:36:11 2010 -0700

    Fix insert character code

 src/math-buttons.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/math-buttons.c b/src/math-buttons.c
index 06fcd49..9f5778f 100644
--- a/src/math-buttons.c
+++ b/src/math-buttons.c
@@ -1200,7 +1200,7 @@ character_code_dialog_response_cb(GtkWidget *dialog, gint response_id, MathButto
                 break;
         }
 
-        math_equation_insert(buttons->priv->equation, text);
+        math_equation_insert_number(buttons->priv->equation, &x);
     }
 
     gtk_widget_hide(dialog);