[gnote] Add virtual destructor for IKeybinder

[Aurimas Äernius <aurimasc src gnome org>]

commit 6133dd7999be7c1ca66ce2385fc8f7cb5ecbea5b
Author: Aurimas Äernius <aurisc4 gmail com>
Date:   Sat Mar 17 17:43:36 2012 +0200

    Add virtual destructor for IKeybinder
    
    Fix compiler warning.

 src/keybinder.hpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/keybinder.hpp b/src/keybinder.hpp
index 29c01f1..3f2cc75 100644
--- a/src/keybinder.hpp
+++ b/src/keybinder.hpp
@@ -36,6 +36,7 @@ namespace gnote {
 class IKeybinder
 {
 public:
+  virtual ~IKeybinder(){}
   virtual void bind(const std::string & keystring, const sigc::slot<void> & handler) = 0;
   virtual void unbind(const std::string & keystring) = 0;
   virtual void unbind_all() = 0;