Fix two compiler warnings

Comparing singed/usigned ints.
Use override keyword.

Change-Id: I03d2c4359e0600360ebcfece593a3b125e5c9c53
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

tests/auto/gui/text/qglyphrun/tst_qglyphrun.cpp

@@ -967,7 +967,7 @@ void tst_QGlyphRun::objectReplacementCharacter()
     QList<QGlyphRun> glyphRuns = layout.glyphRuns();
     QCOMPARE(glyphRuns.size(), 1);
     QCOMPARE(glyphRuns.first().glyphIndexes().size(), 1);
-    QCOMPARE(glyphRuns.first().glyphIndexes().first(), 5);
+    QCOMPARE(glyphRuns.first().glyphIndexes().first(), uint(5));
 }
 
 #endif // QT_NO_RAWFONT

tests/auto/network/access/qnetworkreply/tst_qnetworkreply.cpp

@@ -8117,7 +8117,7 @@ class Qtbug25280Server : public MiniHttpServer
 public:
     Qtbug25280Server(QByteArray qba) : MiniHttpServer(qba, false) {}
     QSet<QTcpSocket*> receivedSockets;
-    virtual void reply()
+    void reply() override
     {
         // Save sockets in a list
         receivedSockets.insert((QTcpSocket*)sender());