[gnote] Prevent couple potential crashes

[Aurimas Černius <aurimasc src gnome org>]

commit 70c8358e210a4ac909d02187c0547eb5dcc66ef8
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Sun Apr 27 18:39:55 2014 +0300

    Prevent couple potential crashes

 src/notemanagerbase.cpp |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/notemanagerbase.cpp b/src/notemanagerbase.cpp
index b0a2ee9..a2c370e 100644
--- a/src/notemanagerbase.cpp
+++ b/src/notemanagerbase.cpp
@@ -321,7 +321,7 @@ NoteBase::Ptr NoteManagerBase::create_new_note(Glib::ustring title, const std::s
 // Create a new note with the specified Xml content
 NoteBase::Ptr NoteManagerBase::create_new_note(const Glib::ustring & title, const Glib::ustring & 
xml_content, 
                                                const std::string & guid)
-{ 
+{
   if(title.empty())
     throw sharp::Exception("Invalid title");
 
@@ -335,6 +335,9 @@ NoteBase::Ptr NoteManagerBase::create_new_note(const Glib::ustring & title, cons
     filename = make_new_file_name();
 
   NoteBase::Ptr new_note = note_create_new(title, filename);
+  if(new_note == 0) {
+    throw sharp::Exception("Failed to create new note");
+  }
   new_note->set_xml_content(xml_content);
   new_note->signal_renamed.connect(sigc::mem_fun(*this, &NoteManagerBase::on_note_rename));
   new_note->signal_saved.connect(sigc::mem_fun(*this, &NoteManagerBase::on_note_save));
@@ -365,6 +368,9 @@ NoteBase::Ptr NoteManagerBase::get_or_create_template_note()
       title = get_unique_name(title);
     }
     template_note = create(title, get_note_template_content(title));
+    if(template_note == 0) {
+      throw sharp::Exception("Failed to create template note");
+    }
 
     // Flag this as a template note
     Tag::Ptr template_tag = 
ITagManager::obj().get_or_create_system_tag(ITagManager::TEMPLATE_NOTE_SYSTEM_TAG);