[niepce] MetaDataWidget::add_data() short return if the propertyvalue is empty.

[Hubert Figuière <hub src gnome org>]

commit 6253e2b9628182f9eb1dcb35e5f29276061e4797
Author: Hubert Figuière <hub figuiere net>
Date:   Fri Jun 28 22:48:30 2013 -0400

    MetaDataWidget::add_data() short return if the propertyvalue is empty.

 src/fwk/toolkit/metadatawidget.cpp |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/fwk/toolkit/metadatawidget.cpp b/src/fwk/toolkit/metadatawidget.cpp
index f6d8552..e33f1bd 100644
--- a/src/fwk/toolkit/metadatawidget.cpp
+++ b/src/fwk/toolkit/metadatawidget.cpp
@@ -384,6 +384,10 @@ bool MetaDataWidget::set_date_data(Gtk::Widget* w, const PropertyValue & value)
 void MetaDataWidget::add_data(const MetaDataFormat * current,
                               const PropertyValue & value)
 {
+    if (is_empty(value)) {
+        return;
+    }
+
     Gtk::Widget *w = nullptr;
     auto iter = m_data_map.find(current->id);
     if(iter == m_data_map.end()) {