[gnote] Replace std::string by Glib::ustring in Exception

[Aurimas Černius <aurimasc src gnome org>]

commit 06db48337cfb747e5a494d58e7d6f4066b27f6d9
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Fri Jan 27 21:48:08 2017 +0200

    Replace std::string by Glib::ustring in Exception

 src/sharp/exception.hpp |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/src/sharp/exception.hpp b/src/sharp/exception.hpp
index be4d987..513f7c8 100644
--- a/src/sharp/exception.hpp
+++ b/src/sharp/exception.hpp
@@ -1,7 +1,7 @@
 /*
  * gnote
  *
- * Copyright (C) 2013 Aurimas Cernius
+ * Copyright (C) 2013,2017 Aurimas Cernius
  * Copyright (C) 2009 Hubert Figuiere
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -30,7 +30,8 @@
 #define __SHARP_EXCEPTION_HPP_
 
 #include <exception>
-#include <string>
+
+#include <glibmm/ustring.h>
 
 #include "base/macros.hpp"
 
@@ -41,7 +42,7 @@ class Exception
   : public std::exception
 {
 public:
-  Exception(const std::string & m) throw()
+  Exception(const Glib::ustring & m) throw()
     : m_what(m)
     {
     }
@@ -50,7 +51,7 @@ public:
   virtual const char *what() const throw() override;
 
 private:
-  std::string m_what;
+  Glib::ustring m_what;
 };
 
 }