Fix release build warnings about unitialized variables.

Change-Id: I1a6ba631b0626969b328276a91561c34154c9a1c
Reviewed-on: http://codereview.qt.nokia.com/1920
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -2791,7 +2791,7 @@ void GdbEngine::extractDataFromInfoBreak(const QString &output, BreakpointModelI
         bool locationComing = false;
         QByteArray location;
         QByteArray function;
-        qulonglong address;
+        qulonglong address = 0;
         foreach (const QByteArray &part, data.split(' ')) {
             if (part.isEmpty())
                 continue;