Do not expose text when echo mode is not Normal.

Reviewed-by: Frederik Gladhorn
(cherry picked from commit 636b7088eb3740800f54a7c1634d3e041e688270)

Change-Id: I82b2e02af74dc43268d2b6613fe31e2875fd132f
Reviewed-on: http://codereview.qt.nokia.com/3038
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@nokia.com>

src/plugins/accessible/widgets/simplewidgets.cpp

@@ -815,6 +815,10 @@ QString QAccessibleLineEdit::text(int startOffset, int endOffset)
 {
     if (startOffset > endOffset)
         return QString();
+
+    if (lineEdit()->echoMode() != QLineEdit::Normal)
+        return QString();
+
     return lineEdit()->text().mid(startOffset, endOffset - startOffset);
 }