QHostInfo: fix a race condition under CE

Merge-request: 1339
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>

Change-Id: Id1f977ad8f746ac848c355880cac688e256721d8
Reviewed-on: http://codereview.qt-project.org/6145
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>

src/network/kernel/qhostinfo_win.cpp

@@ -97,14 +97,15 @@ static void resolveLibrary()
 
 #if defined(Q_OS_WINCE)
 #include <qmutex.h>
-QMutex qPrivCEMutex;
+Q_GLOBAL_STATIC(QMutex, qPrivCEMutex)
 #endif
 
 QHostInfo QHostInfoAgent::fromName(const QString &hostName)
 {
 #if defined(Q_OS_WINCE)
-    QMutexLocker locker(&qPrivCEMutex);
+    QMutexLocker locker(qPrivCEMutex());
 #endif
+
     QWindowsSockInit winSock;
 
     // Load res_init on demand.