[gnote] Fix crash when disabling note add-in

[Aurimas Černius <aurimasc src gnome org>]

commit 2a40da9ec45ac9eb8da93bd08e48cd3ea362a4c6
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Sat Oct 26 19:22:05 2013 +0300

    Fix crash when disabling note add-in

 src/addinmanager.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/addinmanager.cpp b/src/addinmanager.cpp
index e6b879b..3ad0602 100644
--- a/src/addinmanager.cpp
+++ b/src/addinmanager.cpp
@@ -154,6 +154,7 @@ namespace gnote {
         NoteAddin * const addin = it->second;
         if (addin) {
           addin->dispose(true);
+          delete addin;
           id_addin_map.erase(it);
         }
       }