[glom] DialogImageLoadProgress::get_image_data(): Give ownership of the GdaBinary.

[Murray Cumming <murrayc src gnome org>]

commit 66396788b4a66b4ba3517f8e9ccb5157a219f5b5
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Feb 25 13:57:13 2016 +0100

    DialogImageLoadProgress::get_image_data(): Give ownership of the GdaBinary.
    
    This seems to fix the crash when choosing an image repeatedly:
    https://bugzilla.gnome.org/show_bug.cgi?id=761396#c13

 glom/utility_widgets/dialog_image_load_progress.cc |    9 +++++----
 glom/utility_widgets/dialog_image_load_progress.h  |    4 ++--
 2 files changed, 7 insertions(+), 6 deletions(-)
---
diff --git a/glom/utility_widgets/dialog_image_load_progress.cc 
b/glom/utility_widgets/dialog_image_load_progress.cc
index d83a15c..331eba1 100644
--- a/glom/utility_widgets/dialog_image_load_progress.cc
+++ b/glom/utility_widgets/dialog_image_load_progress.cc
@@ -52,7 +52,7 @@ DialogImageLoadProgress::DialogImageLoadProgress(BaseObjectType* cobject, const
 
 DialogImageLoadProgress::~DialogImageLoadProgress()
 {
-  if(m_data.get())
+  if(m_data)
     g_free(m_data->data);
 
   // TODO: Cancel outstanding async operations in destructor?
@@ -63,7 +63,7 @@ void DialogImageLoadProgress::load(const Glib::ustring& uri)
   // Can only load one file with data 
   g_assert(!m_data.get());
 
-  m_data.reset(new GdaBinary);
+  m_data = std::make_unique<GdaBinary>();
   m_data->data = nullptr;
   m_data->binary_length = 0;
 
@@ -165,9 +165,10 @@ void DialogImageLoadProgress::error(const Glib::ustring& error_message)
   response(Gtk::RESPONSE_REJECT);
 }
 
-std::shared_ptr<GdaBinary> DialogImageLoadProgress::get_image_data()
+std::unique_ptr<GdaBinary> DialogImageLoadProgress::get_image_data()
 {
-  return m_data;
+  return std::move(m_data);
+  m_data.reset();
 }
 
 } // namespace Glom
diff --git a/glom/utility_widgets/dialog_image_load_progress.h 
b/glom/utility_widgets/dialog_image_load_progress.h
index 38e7688..989a6d8 100644
--- a/glom/utility_widgets/dialog_image_load_progress.h
+++ b/glom/utility_widgets/dialog_image_load_progress.h
@@ -43,7 +43,7 @@ public:
 
   void load(const Glib::ustring& uri);
 
-  std::shared_ptr<GdaBinary> get_image_data();
+  std::unique_ptr<GdaBinary> get_image_data();
 
 private:
   void error(const Glib::ustring& error_message);
@@ -53,7 +53,7 @@ private:
   void on_stream_read(const Glib::RefPtr<Gio::AsyncResult>& result, unsigned int offset);
   void on_read_next(unsigned int at);
 
-  std::shared_ptr<GdaBinary> m_data;
+  std::unique_ptr<GdaBinary> m_data;
   Gtk::ProgressBar* m_progress_bar;
 
   Glib::RefPtr<Gio::File> m_file;