Save templates in WriteOnly mode to prevent problems with already exi…

…sting file content

git-svn-id: http://svn.osgeo.org/qgis/trunk@10007 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/app/composer/qgscomposer.cpp

@@ -766,7 +766,7 @@ void QgsComposer::on_mActionSaveAsTemplate_activated(void)
   settings.setValue("UI/LastComposerTemplateDir", saveFileInfo.absolutePath());
 
   QFile templateFile(saveFileName);
-  if(!templateFile.open(QIODevice::ReadWrite))
+  if(!templateFile.open(QIODevice::WriteOnly))
   {
       return;
   }