Fix crash in QPlatformInputContextFactory.

If ic is null we shouldn't dereference it.

Change-Id: Idf472c799f8207d893f15a55fac330ea20ec451c
Reviewed-on: http://codereview.qt-project.org/4639
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

src/platformsupport/inputcontext/qplatforminputcontextfactory_qpa.cpp

@@ -84,7 +84,7 @@ QPlatformInputContext *QPlatformInputContextFactory::create()
 
     QString icString = QString::fromLatin1(getenv("QT_IM_MODULE"));
     ic = create(icString);
-    qDebug() << ic << ic->isValid();
+
     if (ic && ic->isValid())
         return ic;