Read the docs a bit more and now set the dialog into 'save' mode correctly

git-svn-id: http://svn.osgeo.org/qgis/trunk@5321 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: g_j_m

src/composer/qgscomposer.cpp

@@ -568,7 +568,7 @@ void QgsComposer::on_mActionExportAsImage_activated(void)
   myQFileDialog->selectFilter(myLastUsedFilter);
 
   // set the 'Open' button to something that makes more sense
-  myQFileDialog->setLabelText(QFileDialog::Accept, tr("Save"));
+  myQFileDialog->setAcceptMode(QFileDialog::AcceptSave);
 
   //prompt the user for a filename
   QString myOutputFileNameQString; // = myQFileDialog->getSaveFileName(); //delete this